Alexander Solntsev | University of Technology Sydney

Biography

Optical physicist. Expertise in spectroscopy, imaging, quantum technology, and micro/nano-photonics. Looking for motivated research students. Open to consulting.

Alexander Solntsev has graduated with a double degree in Physics and Education from the Lomonosov Moscow State University in 2009 and received a PhD from the Australian National University in 2013. He then worked as a Postdoctoral Researcher (2013-2015) and a Research Fellow (2016-2017) at the Australian National University until joining the University of Technology Sydney in 2017.

He received several awards including the Dynasty Foundation Award (2008), Nikolai Koroteev Award (2009), John Carver Award (2012), Robert and Helen Crompton Award (2012), Australian Institute of Physics Postgraduate Medal and Postgraduate Excellence Award (2012), Student of the Year at the Australian National University Nonlinear Physics Centre (2013), Early Career Academic Fellowship at the Australian National University House (2017), the Australian Research Council Discovery Early Career Researcher Award (2018) and University of Technology Sydney Vice Chancellor's Award for Early Career Research Excellence (2018).

Professional

Fellow, ARC DE180100070, “Optical Wavelength Conversion in Nonlinear Dielectric Nano-Resonators”
Primary Chief Investigator, AU/DE Joint Research Cooperation Scheme 2018, “Photonic circuits for deterministic photon sources based on 2D materials”
Chief Investigator, ARC DP160100619, “Active photonic and plasmonic components based on parity-time symmetry”
Referee at the Australian Research Council
Reviewer of leading optical journals: Nature Communications, Optica, Optics Letters, Optics Express, ACS Photonics, APL Photonics, APL, Nanophotonics

Links

Google Scholar

Research Gate

Can supervise: YES

Research Interests

Metamaterials, metasurfaces
Integrated photonic circuits
Laser processing
Nonlinear optics
Quantum optics
Spectroscopy

Teaching Areas

Advanced Nanomaterials (68002)
Nanophotonics (68513)
Optics (68206)

Chung, H-P, Lee, C-H, Huang, K-H, Yang, S-L, Wang, K, Solntsev, AS, Sukhorukov, AA, Setzpfandt, F & Chen, Y-H 2019, 'Broadband on-chip polarization mode splitters in lithium niobate integrated adiabatic couplers.', Optics Express, vol. 27, no. 2, pp. 1632-1645.View/Download from: UTS OPUS or Publisher's site

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We report, to the best of our knowledge, the first broadband polarization mode splitter (PMS) based on the adiabatic light passage mechanism in the lithium niobate (LiNbO3) waveguide platform. A broad bandwidth of ~140 nm spanning telecom S, C, and L bands at polarization-extinction ratios (PER) of >20 dB and >18 dB for the TE and TM polarization modes, respectively, is found in a five-waveguide adiabatic coupler scheme whose structure is optimized by an adiabaticity engineering process in titanium-diffused LiNbO3 waveguides. When the five-waveguide PMS is integrated with a three-waveguide "shortcut to adiabaticity" structure, we realize a broadband, high splitting-ratio (ηc) mode splitter for spatial separation of TE- (H-) polarized pump (700-850 nm for ηc>99%), TM- (V-) polarized signal (1510-1630 nm for ηc>97%), and TE- (H-) polarized idler (1480-1650 nm for ηc>97%) modes. Such a unique integrated-optical device is of potential for facilitating the on-chip implementation of a pump-filtered, broadband tunable entangled quantum-state generator.

Tran, TT, Regan, B, Ekimov, EA, Mu, Z, Zhou, Y, Gao, W-B, Narang, P, Solntsev, AS, Toth, M, Aharonovich, I & Bradac, C 2019, 'Anti-Stokes excitation of solid-state quantum emitters for nanoscale thermometry.', Science Advances, vol. 5, no. 5.View/Download from: UTS OPUS or Publisher's site

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Color centers in solids are the fundamental constituents of a plethora of applications such as lasers, light-emitting diodes, and sensors, as well as the foundation of advanced quantum information and communication technologies. Their photoluminescence properties are usually studied under Stokes excitation, in which the emitted photons are at a lower energy than the excitation ones. In this work, we explore the opposite anti-Stokes process, where excitation is performed with lower-energy photons. We report that the process is sufficiently efficient to excite even a single quantum system-namely, the germanium-vacancy center in diamond. Consequently, we leverage the temperature-dependent, phonon-assisted mechanism to realize an all-optical nanoscale thermometry scheme that outperforms any homologous optical method used to date. Our results frame a promising approach for exploring fundamental light-matter interactions in isolated quantum systems and harness it toward the realization of practical nanoscale thermometry and sensing.

Lenzini, F, Poddubny, AN, Titchener, J, Fisher, P, Boes, A, Kasture, S, Haylock, B, Villa, M, Mitchell, A, Solntsev, AS, Sukhorukov, AA & Lobino, M 2018, 'Direct characterization of a nonlinear photonic circuit's wave function with laser light', Light: Science and Applications, vol. 7, no. 1.View/Download from: UTS OPUS or Publisher's site

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© The Author(s) 2018. Integrated photonics is a leading platform for quantum technologies including nonclassical state generation 1, 2, 3, 4, demonstration of quantum computational complexity 5 and secure quantum communications 6. As photonic circuits grow in complexity, full quantum tomography becomes impractical, and therefore an efficient method for their characterization 7, 8 is essential. Here we propose and demonstrate a fast, reliable method for reconstructing the two-photon state produced by an arbitrary quadratically nonlinear optical circuit. By establishing a rigorous correspondence between the generated quantum state and classical sum-frequency generation measurements from laser light, we overcome the limitations of previous approaches for lossy multi-mode devices 9, 10. We applied this protocol to a multi-channel nonlinear waveguide network and measured a 99.28±0.31% fidelity between classical and quantum characterization. This technique enables fast and precise evaluation of nonlinear quantum photonic networks, a crucial step towards complex, large-scale, device production.

Antonosyan, DA, Solntsev, AS & Sukhorukov, AA 2018, 'Photon-pair generation in a quadratically nonlinear parity-time symmetric coupler', PHOTONICS RESEARCH, vol. 6, no. 4, pp. A6-A9.View/Download from: UTS OPUS or Publisher's site

Duong, NMH, Xu, Z-Q, Kianinia, M, Su, R, Liu, Z, Kim, S, Bradac, C, Li, L-J, Solntsev, A, Liu, J & Aharonovich, I 2018, 'Enhanced Emission from WSe2 Monolayers Coupled to Circular Bragg Gratings', ACS Photonics, vol. 5, pp. 3950-3955.View/Download from: UTS OPUS or Publisher's site

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Two-dimensional transition-metal dichalcogenides (TMDC) are of great interest
for on-chip nanophotonics due to their unique optoelectronic properties. Here,
we propose and realize coupling of tungsten diselenide (WSe2) monolayers to
circular Bragg grating structures to achieve enhanced emission. The interaction
between WSe2 and the resonant mode of the structure results in Purcell-enhanced
emission, while the symmetric geometrical structure improves the directionality
of the out-coupling stream of emitted photons. Furthermore, this hybrid
structure produces a record high contrast of the spin valley readout (> 40%)
revealed by the polarization resolved photoluminescence (PL) measurements. Our
results are promising for on-chip integration of TMDC monolayers with optical
resonators for nanophotonic circuits.

Titchener, J, Gräfe, M, Heilmann, R, Solntsev, A, Szameit, A & Sukhorukov, A 2018, 'Scalable on-chip quantum state tomography', npj Quantum Information, vol. 4.View/Download from: UTS OPUS or Publisher's site

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Quantum information systems are on a path to vastly exceed the complexity of any classical device. The number of entangled qubits in quantum devices is rapidly increasing, and the information required to fully describe these systems scales exponentially with qubit number. This scaling is the key benefit of quantum systems, however it also presents a severe challenge. To characterize such systems typically requires an exponentially long sequence of different measurements, becoming highly resource demanding for large numbers of qubits. Here we propose and demonstrate a novel and scalable method for characterizing quantum systems based on expanding a multi-photon state to larger dimensionality. We establish that the complexity of this new measurement technique only scales linearly with the number of qubits, while providing a tomographically complete set of data without a need for reconfigurability. We experimentally demonstrate an integrated photonic chip capable of measuring two- and three-photon quantum states with statistical reconstruction fidelity of 99.71%.

Wang, K, Titchener, JG, Kruk, SS, Xu, L, Chung, H-P, Parry, M, Kravchenko, II, Chen, Y-H, Solntsev, AS, Kivshar, YS, Neshev, DN & Sukhorukov, AA 2018, 'Quantum metasurface for multiphoton interference and state reconstruction.', Science (New York, N.Y.), vol. 361, no. 6407, pp. 1104-1108.View/Download from: UTS OPUS or Publisher's site

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Metasurfaces based on resonant nanophotonic structures have enabled innovative types of flat-optics devices that often outperform the capabilities of bulk components, yet these advances remain largely unexplored for quantum applications. We show that nonclassical multiphoton interferences can be achieved at the subwavelength scale in all-dielectric metasurfaces. We simultaneously image multiple projections of quantum states with a single metasurface, enabling a robust reconstruction of amplitude, phase, coherence, and entanglement of multiphoton polarization-encoded states. One- and two-photon states are reconstructed through nonlocal photon correlation measurements with polarization-insensitive click detectors positioned after the metasurface, and the scalability to higher photon numbers is established theoretically. Our work illustrates the feasibility of ultrathin quantum metadevices for the manipulation and measurement of multiphoton quantum states, with applications in free-space quantum imaging and communications.

Solntsev, AS, Kumar, P, Pertsch, T, Sukhorukov, AA & Setzpfandt, F 2018, 'LiNbO3 waveguides for integrated SPDC spectroscopy', APL Photonics, vol. 3, no. 2.View/Download from: UTS OPUS or Publisher's site

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© 2018 Author(s). Spontaneous parametric down-conversion (SPDC) spectroscopy using photon pairs is a promising avenue towards affordable mid-infrared (MIR) spectroscopy. Here, we experimentally investigate the feasibility of using periodically poled waveguides in lithium niobate for SPDC spectroscopy applications. We find the waveguides suitable to generate wavelength non-degenerate photon pairs with one photon in the MIR spectral range with high fluence. We use this to determine the cutoff wavelengths of the waveguide mode in the MIR by performing only measurements in the near-infrared spectral range.

Solntsev, AS & Sukhorukov, AA 2017, 'Path-entangled photon sources on nonlinear chips', Reviews in Physics, vol. 2, pp. 19-31.View/Download from: UTS OPUS or Publisher's site

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© 2016 The Authors Photon entanglement has a range of applications from secure communication to the tests of quantum mechanics. Utilizing optical nonlinearity for the generation of entangled photons remains the most widely used approach due to its quality and simplicity. The on-chip integration of entangled light sources has enabled the increase of complexity and enhancement of stability compared to bulk optical implementations. Entanglement over different optical paths is uniquely suited for photonic chips, since waveguides are typically optimized for particular wavelength and polarization, making polarization- and frequency-entanglement less practical. In this review we focus on the latest developments in the field of on-chip nonlinear path-entangled photon sources. We provide a review of recent implementations and compare various approaches to tunability, including thermo-optical, electro-optical and all-optical tuning. We also discuss a range of important technical issues, in particular the on-chip separation of the pump and generated entangled photons. Finally, we review different quality control methods, including on-chip quantum tomography and recently discovered classical-quantum analogy that allows to characterize entangled photon sources by performing simple nonlinear measurements in the classical regime.

Wang, L, Kruk, S, Xu, L, Rahmani, M, Smirnova, D, Solntsev, A, Kravchenko, I, Neshev, D & Kivshar, Y 2017, 'Shaping the third-harmonic radiation from silicon nanodimers', NANOSCALE, vol. 9, no. 6, pp. 2201-2206.View/Download from: UTS OPUS or Publisher's site

Gräfe, M, Antonosyan, DA, Solntsev, AS, Sukhorukov, AA & Szameit, A 2017, 'Optical emulation of photon-pair generation in nonlinear lossy waveguides', EPL, vol. 118, no. 5, pp. 1-7.View/Download from: UTS OPUS or Publisher's site

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© CopyrightEPLA, 2017. We establish theoretically and demonstrate experimentally that photon-pair generation through spontaneous parametric down-conversion in a nonlinear waveguide with scattering or material losses can be effectively emulated by classical laser light propagation through a specially designed linear waveguide circuit. This platform can represent arbitrary photon and pump losses, with a potential for the emulation of non-Markovian decay. We characterize the photon-pair correlation spectrum and observe its characteristic transformation from the well-known sinc-shape in lossless waveguides towards a Lorentzian shape in the presence of photon loss.

Chung, HP, Huang, KH, Wang, K, Yang, SL, Yang, SY, Sung, CI, Solntsev, AS, Sukhorukov, AA, Neshev, DN & Chen, YH 2017, 'Asymmetric adiabatic couplers for fully-integrated broadband quantum-polarization state preparation', Scientific Reports, vol. 7, no. 1, pp. 1-7.View/Download from: UTS OPUS or Publisher's site

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© 2017 The Author(s). Spontaneous parametric down-conversion (SPDC) is a widely used method to generate entangled photons, enabling a range of applications from secure communication to tests of quantum physics. Integrating SPDC on a chip provides interferometric stability, allows to reduce a physical footprint, and opens a pathway to true scalability. However, dealing with different photon polarizations and wavelengths on a chip presents a number of challenging problems. In this work, we demonstrate an on-chip polarization beam-splitter based on z-cut titanium-diffused lithium niobate asymmetric adiabatic couplers (AAC) designed for integration with a type-II SPDC source. Our experimental measurements reveal unique polarization beam-splitting regime with the ability to tune the splitting ratios based on wavelength. I n particular, we measured a splitting ratio of 17 dB over broadband regions ( > 60 nm) for both H-and V-polarized lights and a specific 50%/50% splitting ratio for a cross-polarized photon pair from the AAC. The results show that such a system can be used for preparing different quantum polarization-path states that are controllable by changing the phase-matching conditions in the SPDC over a broad band. Furthermore, we propose a fully integrated electro-optically tunable type-II SPDC polarization-path-entangled state preparation circuit on a single lithium niobate photonic chip.

Bell, BA, Wang, K, Solntsev, AS, Neshev, DN, Sukhorukov, AA & Eggleton, BJ 2017, 'Spectral photonic lattices with complex long-range coupling', Optica, vol. 4, no. 11, pp. 1433-1436.View/Download from: UTS OPUS or Publisher's site

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© 2017 Optical Society of America. Photonic systems such as arrays of coupled waveguides are well suited to emulating quantum mechanics with periodic lattice potentials, allowing the investigation of many physical phenomena in a convenient experimental setting. Usually, photons will 'hop' only between neighboring lattice sites at a rate given by a purely real coupling coefficient, thus limiting the rich physics enabled by long-range coupling with complex coupling coefficients. Here we suggest and experimentally realize a spectral photonic lattice that can be configured to realize a wide variety of complex-valued coupling parameters over arbitrary lattice separations. In this system, a weak signal propagates across discrete frequency channels, driven by nonlinear interaction from stronger pump lasers. Our approach allows the experimental investigation of new discrete lattice physics-as an example, we demonstrate two novel instances of the discrete Talbot effect.

Solntsev, AS, Liu, T, Boes, A, Nguyen, TG, Wu, CW, Setzpfandt, F, Mitchell, A, Neshev, DN & Sukhorukov, AA 2017, 'Towards on-chip photon-pair bell tests: Spatial pump filtering in a LiNbO3 adiabatic coupler', Applied Physics Letters, vol. 111, no. 26, pp. 1-5.View/Download from: UTS OPUS or Publisher's site

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© 2017 Author(s). Nonlinear optical waveguides enable the integration of entangled photon sources and quantum logic gates on a quantum photonic chip. One of the major challenges in such systems is separating the generated entangled photons from the pump laser light. In this work, we experimentally characterize double-N-shaped nonlinear optical adiabatic couplers designed for the generation of spatially entangled photon pairs through spontaneous parametric down-conversion, while simultaneously providing spatial pump filtering and keeping photon-pair states pure. We observe that the pump photons at a wavelength of 671 nm mostly remain in the central waveguide, achieving a filtering ratio of over 20 dB at the outer waveguides. We also perform classical characterization at the photon-pair wavelength of 1342 nm and observe that light fully couples from an input central waveguide to the outer waveguides, showing on chip separation of the pump and the photon-pair wavelength.

Stuetzer, S, Solntsev, AS, Nolte, S, Sukhorukov, AA & Szameit, A 2017, 'Observation of Bloch oscillations with a threshold', APL PHOTONICS, vol. 2, no. 5.View/Download from: Publisher's site

Chen, H, Corboliou, V, Solntsev, AS, Choi, D-Y, Vincenti, MA, de Ceglia, D, de Angelis, C, Lu, Y & Neshev, DN 2017, 'Enhanced second-harmonic generation from two-dimensional MoSe2 on a silicon waveguide', LIGHT-SCIENCE & APPLICATIONS, vol. 6.View/Download from: Publisher's site

Wang, K, Shi, Y, Solntsev, AS, Fan, S, Sukhorukov, AA & Neshev, DN 2017, 'Non-reciprocal geometric phase in nonlinear frequency conversion', OPTICS LETTERS, vol. 42, no. 10, pp. 1990-1993.View/Download from: Publisher's site

Setzpfandt, F, Solntsev, AS & Sukhorukov, AA 2016, 'Nonlocal splitting of photons on a nonlinear chip', OPTICS LETTERS, vol. 41, no. 23, pp. 5604-5607.View/Download from: Publisher's site

Liu, T, Solntsev, AS, Boes, A, Nguyen, T, Will, C, Mitchell, A, Neshev, DN & Sukhorukov, AA 2016, 'Experimental demonstration of bidirectional light transfer in adiabatic waveguide structures', OPTICS LETTERS, vol. 41, no. 22, pp. 5278-5281.View/Download from: Publisher's site

Camacho-Morales, R, Rahmani, M, Kruk, S, Wang, L, Xu, L, Smirnova, DA, Solntsev, AS, Miroshnichenko, A, Tan, HH, Karouta, F, Naureen, S, Vora, K, Carletti, L, De Angelis, C, Jagadish, C, Kivshar, YS & Neshev, DN 2016, 'Nonlinear Generation of Vector Beams From AlGaAs Nanoantennas', NANO LETTERS, vol. 16, no. 11, pp. 7191-7197.View/Download from: UTS OPUS or Publisher's site

Titchener, JG, Solntsev, AS & Sukhorukov, AA 2016, 'Two-photon tomography using on-chip quantum walks', OPTICS LETTERS, vol. 41, no. 17, pp. 4079-4082.View/Download from: UTS OPUS or Publisher's site

Geiss, R, Sergeyev, A, Hartung, H, Solntsev, AS, Sukhorukov, AA, Grange, R, Schrempel, F, Kley, E-B, Tuennermann, A & Pertsch, T 2016, 'Fabrication of free-standing lithium niobate nanowaveguides down to 50nm in width', NANOTECHNOLOGY, vol. 27, no. 6.View/Download from: UTS OPUS or Publisher's site

Setzpfandt, F, Solntsev, AS, Titchener, J, Wu, CW, Xiong, C, Schiek, R, Pertsch, T, Neshev, DN & Sukhorukov, AA 2016, 'Tunable generation of entangled photons in a nonlinear directional coupler', LASER & PHOTONICS REVIEWS, vol. 10, no. 1, pp. 131-136.View/Download from: UTS OPUS or Publisher's site

Antonosyan, DA, Solntsev, AS & Sukhorukov, AA 2015, 'Parity-Time Anti-Symmetric Parametric Amplifier', 2015 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).

Smirnova, DA & Solntsev, AS 2015, 'Cascaded third-harmonic generation in hybrid graphene-semiconductor waveguides', PHYSICAL REVIEW B, vol. 92, no. 15.View/Download from: Publisher's site

Solntsev, AS & Sukhorukov, AA 2015, 'Modulated coupled nanowires for ultrashort pulses', OPTICS LETTERS, vol. 40, no. 17, pp. 4078-4081.View/Download from: Publisher's site

Titchener, JG, Solntsev, AS & Sukhorukov, AA 2015, 'Generation of photons with all-optically-reconfigurable entanglement in integrated nonlinear waveguides', PHYSICAL REVIEW A, vol. 92, no. 3.View/Download from: Publisher's site

Leykam, D, Solntsev, AS, Sukhorukov, AA & Desyatnikov, AS 2015, 'Lattice topology and spontaneous parametric down-conversion in quadratic nonlinear waveguide arrays', PHYSICAL REVIEW A, vol. 92, no. 3.View/Download from: Publisher's site

Solntsev, AS, Kitaeva, GK, Naumova, II & Penin, AN 2015, 'Characterization of aperiodic domain structure in lithium niobate by spontaneous parametric down-conversion spectroscopy', LASER PHYSICS LETTERS, vol. 12, no. 9.View/Download from: Publisher's site

Sergeyev, A, Geiss, R, Solntsev, AS, Sukhorukov, AA, Schrempel, F, Pertsch, T & Grange, R 2015, 'Enhancing Guided Second-Harmonic Light in Lithium Niobate Nanowires', ACS PHOTONICS, vol. 2, no. 6, pp. 687-691.View/Download from: Publisher's site

Antonosyan, DA, Solntsev, AS & Sukhorukov, AA 2014, 'Effect of loss on photon-pair generation in nonlinear waveguide arrays', PHYSICAL REVIEW A, vol. 90, no. 4.View/Download from: Publisher's site

Solntsev, AS, Setzpfandt, F, Clark, AS, Wu, CW, Collins, MJ, Xiong, C, Schreiber, A, Katzschmann, F, Eilenberger, F, Schiek, R, Sohler, W, Mitchell, A, Silberhorn, C, Eggleton, BJ, Pertsch, T, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2014, 'Generation of Nonclassical Biphoton States through Cascaded Quantum Walks on a Nonlinear Chip', PHYSICAL REVIEW X, vol. 4, no. 3.View/Download from: Publisher's site

Antonosyan, DA, Solntsev, AS & Sukhorukov, AA 2014, 'Single-photon spontaneous parametric down-conversion in quadratic nonlinear waveguide arrays', OPTICS COMMUNICATIONS, vol. 327, pp. 22-26.View/Download from: Publisher's site

Setzpfandt, F, Solntsev, AS, Neshev, DN, Pertsch, T, Sohler, W & Schiek, R 2014, 'Temporal dynamics of spatially localized waves in quadratic nonlinear waveguide arrays', PHYSICAL REVIEW A, vol. 89, no. 3.View/Download from: Publisher's site

Sukhorukov, AA, Solntsev, AS, Kruk, SS, Neshev, DN & Kivshar, YS 2014, 'Nonlinear coupled-mode theory for periodic plasmonic waveguides and metamaterials with loss and gain', OPTICS LETTERS, vol. 39, no. 3, pp. 462-465.View/Download from: Publisher's site

Wu, CW, Solntsev, AS, Neshev, DN, Sukhorukov, AA & Kivshar, YS 2013, 'Photon pair generation in nonlinear adiabatic waveguiding structures', 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).

Sergeyev, A, Geiss, R, Solntsev, AS, Steinbrueck, A, Schrempel, F, Kley, E-B, Pertsch, T & Grange, R 2013, 'Second-harmonic generation in lithium niobate nanowires for local fluorescence excitation', OPTICS EXPRESS, vol. 21, no. 16, pp. 19012-19021.View/Download from: Publisher's site

Markin, DM, Solntsev, AS & Sukhorukov, AA 2013, 'Generation of orbital-angular-momentum-entangled biphotons in triangular quadratic waveguide arrays', PHYSICAL REVIEW A, vol. 87, no. 6.View/Download from: Publisher's site

Sukhorukov, AA, Solntsev, AS & Sipe, JE 2013, 'Classical simulation of squeezed light in optical waveguide arrays', PHYSICAL REVIEW A, vol. 87, no. 5.View/Download from: Publisher's site

Graefe, M, Solntsev, AS, Keil, R, Sukhorukov, AA, Heinrich, M, Tuennermann, A, Nolte, S, Szameit, A & Kivshar, YS 2012, 'Biphoton generation in quadratic waveguide arrays: A classical optical simulation', SCIENTIFIC REPORTS, vol. 2.View/Download from: Publisher's site

Schiek, R, Solntsev, AS & Neshev, DN 2012, 'Temporal dynamics of all-optical switching in quadratic nonlinear directional couplers', APPLIED PHYSICS LETTERS, vol. 100, no. 11.View/Download from: Publisher's site

Solntsev, AS & Sukhorukov, AA 2012, 'Combined frequency conversion and pulse compression in nonlinear tapered waveguides', Optics Letters, vol. 37, no. 4, pp. 446-448.View/Download from: Publisher's site

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We suggest an application of pump-degenerate four-wave mixing process in tapered waveguides for generation of ultrashort pulses with central frequency tunable over the material transparency range. Our method can produce strongly compressed frequency-converted pulses in presence of group-velocity mismatch and group-velocity dispersion. Additionally, the proposed technique does not require pulse phase synchronization and effectively operates for strongly chirped pump pulses, thus enabling the use of longer nonlinear media for high conversion efficiency. © 2012 Optical Society of America.

Solntsev, AS, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2012, 'Spontaneous Parametric Down-Conversion and Quantum Walks in Arrays of Quadratic Nonlinear Waveguides', PHYSICAL REVIEW LETTERS, vol. 108, no. 2.View/Download from: Publisher's site

Setzpfandt, F, Sukhorukov, AA, Neshev, DN, Schiek, R, Solntsev, AS, Ricken, R, Min, Y, Sohler, W, Kivshar, YS & Pertsch, T 2011, 'Spectral pulse transformations and phase transitions in quadratic nonlinear waveguide arrays', OPTICS EXPRESS, vol. 19, no. 23, pp. 23188-23201.View/Download from: Publisher's site

Solntsev, AS, Sukhorukov, AA, Neshev, DN, Iliew, R, Geiss, R, Pertsch, T & Kivshar, YS 2011, 'Cascaded third harmonic generation in lithium niobate nanowaveguides', APPLIED PHYSICS LETTERS, vol. 98, no. 23.View/Download from: Publisher's site

Solntsev, AS, Kitaeva, GK, Naumova, II & Penin, AN 2010, 'Measurement of the extraordinary refractive index dispersion in the MIR for Mg:Nd:LiNbO3 crystals by the use of quasi-phase-matching in a random 1D domain structure', APPLIED PHYSICS B-LASERS AND OPTICS, vol. 99, no. 1-2, pp. 197-201.View/Download from: Publisher's site

Huang, YC, Solntsev, AS, Wang, TD & Hsu, WW 2009, 'Generation of fs laser pulses from a ps pulse-pumped optical parametric amplifier with a beat-wave seed signal', OPTICS COMMUNICATIONS, vol. 282, no. 11, pp. 2250-2254.View/Download from: Publisher's site

Chung, HP, Lee, CH, Huang, KH, Yang, SL, Wang, K, Solntsev, AS, Sukhorukov, AA, Setzpfandt, F & Chen, YH 2019, 'Broadband on-chip adiabatic-coupling polarization mode splitters in lithium niobate waveguides', Optics InfoBase Conference Papers.View/Download from: Publisher's site

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© 2019 The Author (s). We report the first broadband (>120 nm at >97% splitting efficiency for both polarization modes) polarization mode-splitter in LiNbO3 adiabatic light-passage configuration. This device can facilitate the on-chip implementation of pump-filtered, broadband tunable Bell-state generators.

Tran, TT, Regan, B, Ekimov, EA, Mu, Z, Yu, Z, Gao, W, Narang, P, Solntsev, AS, Toth, M, Aharonovich, I & Bradac, C 2019, 'Anti-Stokes excitation of solid-state quantum emitters for nanoscale thermometry', Optics InfoBase Conference Papers.View/Download from: Publisher's site

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© 2019 The Author(s) We report the first demonstration of Anti-Stokes excitation on a single solid-state quantum emitter-namely the germanium-vacancy center in diamond and its application as a high-sensitive nanoscale thermal sensor.

Setzpfandt, F, Solntsev, AS, Titchener, J, Wu, CW, Xiong, C, Pertsch, T, Schiek, R, Neshev, DN & Sukhorukov, AA 2019, 'Tunable entangled photon states from a nonlinear directional coupler', Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015.

Antonosyan, DA, Solntsev, AS & Sukhorukov, AA 2019, 'Parity-time anti-symmetric parametric amplifier', Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015.

Gräfe, M, Antonosyan, DA, Solntsev, AS, Szameit, AS & Sukhorukov, AA 2019, 'Optical simulation of photon-pair generation in nonlinear lossy waveguides', Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015.

Setzpfandt, F, Solntsev, AS, Pertsch, T & Sukhorukov, AA 2019, 'Nonlocal parametric down-conversion in multi-mode nonlinear waveguide arrays', Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015.

Sergeyev, A, Geiss, R, Solntsev, AS, Sukhorukov, AA, Schrempel, F, Pertsch, T & Grange, R 2019, 'Maximizing the guided second-harmonic in lithium niobate nanowires', Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015.

Tran, TT, Regan, B, Ekimov, EA, Mu, Z, Yu, Z, Gao, W, Narang, P, Solntsev, AS, Toth, M, Aharonovich, I & Bradac, C 2019, 'Anti-Stokes Excitation of Solid-State Quantum Emitters for Nanoscale Thermometry', 2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings.View/Download from: Publisher's site

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© 2019 The Author(s) 2019 OSA. We report the first demonstration of Anti-Stokes excitation on a single solid-state quantum emitter-namely the germanium-vacancy center in diamond and its application as a high-sensitive nanoscale thermal sensor.

Chung, H-P, Lee, C-H, Huang, K-H, Yang, S-L, Wang, K, Solntsev, A, Sukhorukov, AA, Setzpfandt, F & Chen, Y-H 2019, 'Broadband on-chip adiabatic-coupling polarization mode splitters in lithium niobate waveguides', 2019 Conference on Lasers and Electro-Optics (CLEO) Proceedings, Conference on Lasers and Electro-Optics, IEEE, USA.View/Download from: UTS OPUS or Publisher's site

Solntsev, A, Aharonovich, I & Toth, M 2018, 'Quantum Emitters in 2D materials', MICRO- AND NANOTECHNOLOGY SENSORS, SYSTEMS, AND APPLICATIONS X, Conference on Micro- and Nanotechnology Sensors, Systems, and Applications X, SPIE-INT SOC OPTICAL ENGINEERING, Orlando, FL.View/Download from: UTS OPUS or Publisher's site

Chung, HP, Huang, KH, Wang, K, Yang, SL, Yang, SY, Sung, CI, Solntsev, AS, Sukhorukov, AA, Neshev, DN & Chen, YH 2018, 'On-chip adiabatic couplers for broadband quantum-polarization state preparation', 2018 Conference on Lasers and Electro-Optics, CLEO 2018 - Proceedings.View/Download from: UTS OPUS

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© 2018 OSA. We present a unique wavelength-dependent polarization splitter based on asymmetric adiabatic couplers designed for integration with type-II spontaneous parametric-down-conversion sources. The system can be used for preparing different quantum polarization-path states over a broad band.

Wang, K, Titchener, J, Bell, B, Solntsev, AS, Neshev, DN, Eggleton, BJ & Sukhorukov, AA 2018, 'Multi-dimensional synthetic space and state measurement with spectral photonic lattices', Optics InfoBase Conference Papers.View/Download from: UTS OPUS or Publisher's site

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© OSA 2018. We propose and experimentally realize spectral photonic lattices with pumpinduced frequency couplings, which can emulate multi-dimensional dynamics with synthetic gauge fields and enable single-shot measurement of the signal phase and coherence.

Marino, G, Solntsev, AS, Xu, L, Gili, VF, Carletti, L, Poddubny, AN, Rahmani, M, Smirnova, D, Chen, H, Zhang, G, Zayats, AV, De Angelis, C, Leo, G, Kivshar, YS, Sukhorukov, AA & Neshev, DN 2018, 'Sum-frequency- and photon-pair-generation in AlGaAs nano-disks', Optics InfoBase Conference Papers.View/Download from: UTS OPUS or Publisher's site

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© 2018 The Author(s). We demonstrate experimentally the generation of sum-frequency signal and heralded photons with non-classical correlations via spontaneous parametric down-conversion in AlGaAs nanodisks.

Solntsev, AS, Kumar, P, Pertsch, T, Sukhorukov, AA & Setzpfandt, F 2018, 'Towards SPDC spectroscopy on a LiNbO<inf>3</inf> Chip', Optics InfoBase Conference Papers.View/Download from: UTS OPUS or Publisher's site

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© 2018 The Author(s). We demonstrate experimentally on-chip-integrated spontaneous parametric downconversion spectroscopy by generating biphotons in a LiNbO<inf>3</inf> waveguide and using signal photon detection in the NIR to study the dynamics of idler photons in the MIR.

Wang, K, Titchener, JG, Bell, BA, Solntsev, AS, Neshev, DN, Eggleton, BJ & Sukhorukov, AA 2018, 'Scalable multi-dimensional synthetic space and full state reconstruction in spectral lattices', Optics InfoBase Conference Papers.View/Download from: UTS OPUS or Publisher's site

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© 2018 The Author(s). We propose and experimentally realize spectral photonic lattices with pumpinduced frequency couplings, which can emulate multi-dimensional dynamics with synthetic gauge fields and enable single-shot measurement of the signal phase and coherence.

Wang, K, Titchener, J, Bell, B, Solntsev, AS, Neshev, DN, Eggleton, BJ & Sukhorukov, AA 2018, 'Multi-dimensional synthetic space and state measurement with spectral photonic lattices', 2018 Conference on Lasers and Electro-Optics, CLEO 2018 - Proceedings.View/Download from: UTS OPUS

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© 2018 OSA. We propose and experimentally realize spectral photonic lattices with pump-induced frequency couplings, which can emulate multi-dimensional dynamics with synthetic gauge fields and enable single-shot measurement of the signal phase and coherence.

Solntsev, AS, Kumar, P, Pertsch, T, Setzpfandt, F & Sukhorukov, AA 2017, 'Integrated quantum spectroscopy on a nonlinear chip', 2017 Conference on Lasers and Electro-Optics, CLEO 2017 - Proceedings, Conference on Lasers and Electro-Optics, IEEE, San Jose, CA, USA, pp. 1-2.View/Download from: UTS OPUS or Publisher's site

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©2017 IEEE We demonstrate experimentally on-chip-integrated quantum spectroscopy by generating biphotons in a LiNbO3waveguide through spontaneous parametric down-conversion, and using signal photon detection in the NIR to study the dynamics of idler photons in the MIR.

Chen, H, Corboliou, V, Solntsev, AS, Choi, DY, Vincenti, MA, De Ceglia, D, De Angelis, C, Lu, Y & Neshev, DN 2017, 'Enhanced second-harmonic generation from two-dimensional MoSe2 by waveguide integration', Conference on Lasers and Electro-Optics, IEEE, San Jose, CA, USA, pp. 1-2.View/Download from: UTS OPUS

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© 2017 IEEE. We demonstrate enhanced second-harmonic generation from a monolayer MoSe2through Si waveguide integration. This is achieved by exciting the monolayer through the guided mode, which dramatically increases the interaction length and allows for phasematching.

Marino, G, Solntsev, AS, Xu, L, Gili, V, Carletti, L, Poddubny, AN, Smirnova, D, Chen, H, Zhang, G, Zayats, A, De Angelis, C, Leo, G, Kivshar, YS, Sukhorukov, AA & Neshev, DN 2017, 'Sum-frequency generation and photon-pair creation in AlGaAs nano-scale resonators', 2017 Conference on Lasers and Electro-Optics, CLEO 2017 - Proceedings, Conference on Lasers and Electro-Optics, IEEE, San Jose, CA, USA, pp. 1-2.View/Download from: UTS OPUS or Publisher's site

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©2017 IEEE We demonstrate experimentally sum-frequency generation in AlGaAs nano-resonators, establishing a quantum-classical correspondence with spontaneous parametric down-conversion. We predict that AlGaAs nano-resonators can be utilized as high-rate sources of photon pairs with non-classical correlations.

Wang, K, Kruk, SS, Xu, L, Parry, M, Chung, HP, Solntsev, AS, Titchener, J, Kravchenko, I, Chen, YH, Kivshar, YS, Neshev, DN & Sukhorukov, AA 2017, 'Quantum imaging with dielectric metasurfaces for multi-photon polarization tomography', 2017 Conference on Lasers and Electro-Optics, CLEO 2017 - Proceedings, Conference on Lasers and Electro-Optics, IEEE, San Jose, CA, USA, pp. 1-2.View/Download from: UTS OPUS or Publisher's site

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© 2017 IEEE. We suggest and realize experimentally dielectric metasurfaces with high transmission efficiency for quantum multi-photon tomography, allowing for full reconstruction of pure or mixed quantum polarization states across a broad bandwidth.

Titchener, J, Gräfe, M, Heilmann, R, Solntsev, AS, Szameit, A & Sukhorukov, AA 2017, 'Scalable quantum tomography in a photonic chip', 2017 Conference on Lasers and Electro-Optics, CLEO 2017 - Proceedings, Conference on Lasers and Electro-Optics, IEEE, San Jose, CA, USA, pp. 1-2.View/Download from: UTS OPUS or Publisher's site

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© 2017 IEEE. We formulate a method of quantum tomography that scales linearly with the number of photons and involves only one optical transformation. We demonstrate it experimentally for two-photon entangled states using a special photonic chip.

Grafe, M, Antonosyan, DA, Solntsev, AS, Sukhorukov, AA & Szameit, A 2017, 'Optical emulation of photon-pair generation in nonlinear lossy waveguides', EPL, EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY.View/Download from: Publisher's site

Chen, H, Corboliou, V, Solntsev, AS, Choi, D-Y, Vincenti, MA, de Ceglie, D, De Angelis, C, Lu, Y & Neshev, D 2017, 'Hybrid integration of two-dimensional MoSe2 on a silicon waveguide for second-order nonlinear optics', 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC), Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (CLEO/Europe-EQEC), IEEE, Munich, GERMANY.

Solntsev, AS, Kumar, P, Pertsch, T, Sukhorukov, AA & Setzpfandt, F 2017, 'Quantum spectroscopy on a nonlinear photonic chip', Optics InfoBase Conference Papers, Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, IEEE, Munich, Germany.View/Download from: UTS OPUS or Publisher's site

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Quantum spectroscopy is a powerful tool that is based on classically detecting one of the photons of a biphoton state to study how the other photon experiences the environment [1]. It is especially useful, since the signal photon can be read out in the visible range, where the detection is simple and affordable, while the idler photon can probe the optical properties in mid-infrared (MIR) and far-infrared (FIR) ranges, which typically requires expensive and bulky solutions when using conventional spectroscopic approaches. Quantum spectroscopy has been utilized to measure broadband refractive index dispersion [2] and domain structure [3] of solids in a single shot of a non-tunable continuous-wave laser, as well as to precisely determine the optical properties of gases [4].

Marino, G, Solntsev, AS, Xu, L, Gili, V, Carletti, L, Poddubny, AN, Smirnova, D, Chen, H, Zhang, G, Zayats, AV, Angelis, CD, Leo, G, Kivshar, YS, Sukhorukov, AA & Neshev, DN 2017, 'Sum-frequency generation and photon-pair creation in AlGaAs nano-disks', Optics InfoBase Conference Papers, Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, IEEE, Munich, Germany.View/Download from: UTS OPUS or Publisher's site

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All-dielectric and semiconductor nonlinear nanophotonics is an emerging field enabling efficient optical interactions between magnetic and electric resonances at sub-wavelength scales, thereby achieving high directionality and high figures of merit due to very low losses [1, 2]. It was shown that AlGaAs nanodisks with quadratic nonlinear susceptibility can provide second harmonic generation (SHG) with record-high efficiency of 10 -4 [3], opening to a wide range of possible applications, including nonlinear microscopy and holography. In this work, we show experimentally that the strong quadratic nonlinearity in AlGaAs nano-disks allows efficient sum-frequency generation (SFG) with nontrivial polarization dependencies. By using the established classical-quantum analogy [4], we predict that these nano-resonators can facilitate efficient generation of quantum entangled photon pairs with higher than kHz biphoton rate and strong angular correlations.

Wang, K, Kruk, SS, Xu, L, Parry, M, Chung, HP, Solntsev, AS, Titchener, J, Kravchenko, I, Chen, YH, Kivshar, YS, Neshev, DN & Sukhorukov, AA 2017, 'Quantum polarization tomography with all-dielectric metasurfaces', Optics InfoBase Conference Papers, European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference, OSA Publishing, Munich, Germany.View/Download from: UTS OPUS

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Measurements of quantum states of photons are conventionally performed with series of optical elements in bulk setups [1] or optical chips incorporating multiple tunable beam splitters. Here, we suggest and develop experimentally, for the first time to our knowledge, a new concept of quantum-polarization measurements with a single all-dielectric resonant metasurface [2]. The operating principle is presented in Fig. 1(a): A metasurface spatially splits different components of photon polarization states, which then enables full reconstruction of the photon state based on the photon correlations with simple polarization-insensitive single-photon detectors or EMCCD cameras. The subwavelength thin structure provides an ultimate miniaturization, and can facilitate quantum tomography by spatially-resolved imaging without a need for reconfiguration. Such parallel-detection approach promises not only better robustness and scalability, but also the possibility to study the dynamics of quantum states in real-time.

Titchener, J, Gräfe, M, Heilmann, R, Solntsev, AS, Szameit, A & Sukhorukov, AA 2017, 'Scalable on-chip quantum state tomography', Optics InfoBase Conference Papers.View/Download from: UTS OPUS

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Wang, K, Kruk, SS, Xu, L, Parry, M, Chung, HP, Titchener, J, Kravchenko, I, Chen, YH, Solntsev, AS, Kivshar, YS, Neshev, DN & Sukhorukov, AA 2017, 'Quantum tomography with all-dielectric metasurfaces', Optics InfoBase Conference Papers, Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, IEEE, Munich, Germany.View/Download from: UTS OPUS or Publisher's site

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© OSA 2017. We suggest and realize experimentally dielectric metasurfaces with high transmission efficiency for quantum multi-photon tomography, allowing for full reconstruction of pure or mixed quantum polarization states across a broad bandwidth.

Bell, B, Wang, K, Solntsev, AS, Neshev, DN, Sukhorukov, AA & Eggleton, B 2017, 'Nonlinearity-induced spectral lattice with optically tunable long-range complex hopping', Optics InfoBase Conference Papers.View/Download from: Publisher's site

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© OSA 2017. We suggest and realize experimentally quantum walks on a spectral photonic lattice with optically tunable long-range and complex hopping coefficients facilitated by nonlinear parametric interactions, enabling asymmetric frequency shaping and Talbot effect with arbitrary periodicity.

Wang, K, Weimann, S, Richardt, T, Zimmermann, F, Solntsev, AS, Nolte, S, Sukhorukov, AA & Szameit, A 2017, 'Measuring the complex weak value of photon wavefunctions beyond weak interaction regime', Optics InfoBase Conference Papers.View/Download from: Publisher's site

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Rahmani, M, Kruk, S, Camacho-Morales, R, Xu, L, Wang, L, Miroshnichenko, AE, Smirnova, D, Tan, H, Karouta, F, Naureen, S, Vora, K, Solntsev, AS, Carletti, L, De Angelis, C, Jagadish, C, Kivshar, YS & Neshev, DN 2017, 'Giant enhancement and control of second-harmonic radiation from algaas nanoantennas', 2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017, Conference on Lasers and Electro-Optics Pacific Rim, IEEE, Singapore, Singapore, pp. 1-3.View/Download from: UTS OPUS or Publisher's site

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© 2017 Institute of Electrical and Electronics Engineers Inc. All Rights Reserved. We fabricate AlGaAs nanoantennas on a glass substrate and demonstrate the highest nonlinear conversion efficiency of 10-4with the capability for shaping the radiation patterns and polarization of the second harmonic emission in both forward and backward directions. We also decode dynamic multipolar contributions to the second harmonic generation within such nanoantennas.

Lenzini, F, Poddubny, AN, Titchener, J, Fisher, P, Boes, A, Kasture, S, Haylock, B, Villa, M, Mitchell, A, Solntsev, AS, Sukhorukov, AA & Lobino, M 2017, 'Quantum tomography of a nonlinear photonic circuit by classical sum-frequency generation measurements', 2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017, Conference on Lasers and Electro-Optics Pacific Rim, IEEE, Singapore, Singapore, pp. 1-2.View/Download from: UTS OPUS or Publisher's site

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© 2017 Institute of Electrical and Electronics Engineers Inc. All rights reserved. We propose and demonstrate a new method for the characterization of nonlinear multimode integrated devices that reconstruct the biphoton state produced trough spontaneous parametric down-conversion (SPDC) using classical sum-frequency generation measurements. The proposed method is experimentally demonstrated by predicting the state generated from a multi-channel integrated nonlinear waveguide device.

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© 2018 Optics InfoBase Conference Papers. All rights reserved. We propose and demonstrate a new method for the characterization of nonlinear multimode integrated devices that reconstruct the biphoton state produced trough spontaneous parametric down-conversion (SPDC) using classical sum-frequency generation measurements. The proposed method is experimentally demonstrated by predicting the state generated from a multi-channel integrated nonlinear waveguide device.

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© 2018 Optics InfoBase Conference Papers. All rights reserved. We fabricate AlGaAs nanoantennas on a glass substrate and demonstrate the highest nonlinear conversion efficiency of 10 -4 with the capability for shaping the radiation patterns and polarization of the second harmonic emission in both forward and backward directions. We also decode dynamic multipolar contributions to the second harmonic generation within such nanoantennas.

Titchener, JG, Solntsev, AS & Sukhorukov, AA 2016, 'Photonic cluster state generation in nonlinear waveguide arrays', Optics InfoBase Conference Papers, Photonics and Fiber Technology 2016 (ACOFT, BGPP, NP), OSA publishing, Sydney, Australia.View/Download from: Publisher's site

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© 2016 OSA.We present a novel approach for all-optically reconfigurable integrated generation of quantum entangled photons in cluster states through spontaneous parametric down-conversion in coupled arrays of quadratic nonlinear waveguides with special poling patterns.

Wang, K, Shi, Y, Solntsev, AS, Fan, S, Sukhorukov, AA & Neshev, DN 2016, 'Controllable non-reciprocity induced by in-band photonic transitions in χ(2) nonlinear optics', Optics InfoBase Conference Papers, Photonics and Fiber Technology 2016 (ACOFT, BGPP, NP), OSA Publishing, Sydney, Australia.View/Download from: Publisher's site

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© 2016 OSA.We demonstrate a controllable non-reciprocity via in-band transitions of photons mediated by second-order parametric nonlinear processes, and propose a dynamic optical isolator based on directional geometric phase-shifts controlled by a single pump.

Camacho-Morales, R, Rahmani, M, Kruk, S, Wang, L, Xu, L, Miroshnichenko, AE, Smirnova, D, Tan, H, Karouta, F, Naureen, S, Vora, K, Solntsev, AS, Carletti, L, De Angelis, C, Jagadish, C, Kivshar, YS & Neshev, DN 2016, 'Shaping the radiation pattern of second-harmonic generation from AlGaAs nonlinear nanoantennas', Optics InfoBase Conference Papers, Photonics and Fiber Technology 2016 (ACOFT, BGPP, NP), OSA Publishing, Sydney, Australia.View/Download from: Publisher's site

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© OSA 2016.We fabricate AlGaAs nanodisk antennas on a glass substrate and demonstrate experimentally the shaping of radiation patterns and polarization of the second harmonic emission in both forward and backward directions.

Titchener, J, Gräfe, M, Heilmann, R, Solntsev, AS, Szameit, A & Sukhorukov, AA 2016, 'Scalable on-chip quantum state tomography', Optics InfoBase Conference Papers.View/Download from: Publisher's site

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© OSA 2016. We formulate a method of quantum tomography that scales linearly with the number of photons and involves only one optical transformation. We demonstrate it experimentally for twophoton entangled states using a special photonic chip.

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Camacho-Morales, R, Rahmani, M, Kruk, S, Wang, L, Xu, L, Miroshnichenko, AE, Smirnova, D, Tan, H, Karouta, F, Naureen, S, Vora, K, Solntsev, AS, Carletti, L, De Angelis, C, Jagadish, C, Kivshar, YS & Neshev, DN 2016, 'Shaping the radiation pattern of second-harmonic generation from AlGaAs nonlinear nanoantennas', Optics InfoBase Conference Papers, Photonics and Fiber Technology 2016, OSA Publishing, Sydney, Australia.View/Download from: Publisher's site

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© 2016 OSA.We fabricate AlGaAs nanodisk antennas on a glass substrate and demonstrate experimentally the shaping of radiation patterns and polarization of the second harmonic emission in both forward and backward directions.

Lenzini, F, Titchener, J, Kasture, S, Boes, A, Poddubny, AN, Fisher, P, Haylock, B, Villa, M, Mitchell, A, Solntsev, AS, Sukhorukov, AA & Lobino, M 2016, 'A nonlinear waveguide array with inhomogeneous poling pattern for the generation of photon pairs and its characterization in the quantum and classical regimes', Optics InfoBase Conference Papers, Photonics and Fiber Technology 2016 (ACOFT, BGPP, NP), OSA Publishing, Sydney, Australia.View/Download from: Publisher's site

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© 2016 OSA.We present the realization of an inhomogeneously poled nonlinear waveguide array for the generation of photon pairs. The device is characterized by coincidence counting and a novel method based on reversed sum-frequency generation measurements.

Solntsev, AS, Carletti, L, Xu, L, Poddubny, AN, De Angelis, C, Leo, G, Kivshar, YS, Neshev, DN & Sukhorukov, AA 2016, 'Quantum-classical correspondence for photon-pair generation in nonlinear dielectric nano-resonators', Optics InfoBase Conference Papers, Photonics and Fiber Technology 2016 (ACOFT, BGPP, NP), OSA Publishing, Sydney, Australia.View/Download from: Publisher's site

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© 2016 OSA.We predict highly efficient sum-frequency conversion in quadratic nonlinear dielectric nano-resonators made of AlGaAs, and formulate a general quantum-classical correspondence with spontaneous parametric down-conversion, revealing a photon-pair generation regime with non-classical angular correlations.

Lenzini, F, Titchener, J, Kasture, S, Poddubny, AN, Boes, A, Haylock, B, Villa, M, Mitchell, A, Solntsev, AS, Sukhorukov, AA & Lobino, M 2016, 'A nonlinear waveguide array with inhomogeneous poling pattern for the generation of photon pairs', 2016 Conference on Lasers and Electro-Optics, CLEO 2016, Photonics and Fiber Technology 2016 (ACOFT, BGPP, NP), OSA Publishing, Sydney, Australia.View/Download from: Publisher's site

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© 2016 OSA.We present the realization of an inhomogeneously poled nonlinear waveguide array for the generation of photon pairs with integrated pump filtering. The biphoton wave-function produced from the device is characterized using reversed sum-frequency generation measurements.

Stutzer, S, Solntsev, AS, Nolte, S, Sukhorukov, AA & Szameit, A 2016, 'Observation of Bloch oscillations with a threshold', 2016 Conference on Lasers and Electro-Optics, CLEO 2016, Photonics and Fiber Technology 2016 (ACOFT, BGPP, NP), OSA Publishing, Sydney, Australia.View/Download from: Publisher's site

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© 2016 OSA.We predict and demonstrate experimentally a metal-insulator phase transition from extended wave transport to localized Bloch oscillations at a critical effective potential strength in photonic lattices, which realize optical emulator of quantum photon squeezing.

Grafe, M, Antonosyan, DA, Solntsev, AS, Szameit, A & Sukhorukov, AA 2016, 'Photon-pair generation in nonlinear lossy waveguides: An optical emulation', 2016 Conference on Lasers and Electro-Optics, CLEO 2016, Conference on Lasers and Electro-Optics, OSA Publishing, San Jose, California United States.View/Download from: Publisher's site

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© 2016 OSA.We demonstrate a coupled-waveguide platform which realizes classical optical simulation of quantum photon-pair generation through spontaneous parametric down-conversion in a nonlinear lossy waveguide. The photon-pair creation vs. the phase mismatch and loss are experimentally mapped.

Antonosyan, DA, Solntsev, AS & Sukhorukov, AA 2015, 'Parity-time anti-symmetric parametric amplifier', OPTICS LETTERS, OPTICAL SOC AMER, pp. 4575-4578.View/Download from: Publisher's site

Titchener, JG, Solntsev, AS & Sukhorukov, AA 2015, 'Bell state generation and pump filtering using inhomogeneously poled nonlinear waveguides', Proceedings of Frontiers in Optics 2015, FIO 2015.

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© OSA 2015. We show that special domain poling patterns in arrays of coupled nonlinear waveguides can allow shaping of the photon pair wavefunction produced by down-conversion. This allows pump filtering and the reconfigurable generation of Bell states.

Setzpfandt, F, Solntsev, AS, Titchener, J, Wu, CW, Xiong, C, Pertsch, T, Schiek, R, Neshev, DN & Sukhorukov, AA 2015, 'Optically tunable entangled photon state generation in a nonlinear directional coupler', 2015 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), Conference on Lasers and Electro-Optics (CLEO), IEEE, San Jose, CA.

Antonosyan, DA, Solntsev, AS & Sukhorukov, AA 2015, 'Parity-Time Anti-Symmetric Parametric Amplification', ACTIVE PHOTONIC MATERIALS VII, Conference on Active Photonic Materials VII, SPIE-INT SOC OPTICAL ENGINEERING, San Diego, CA.View/Download from: Publisher's site

Antonosyan, DA, Solntsev, AS & Sukhorukov, AA 2015, 'Parity-time anti-symmetric parametric amplification', Proceedings of SPIE - The International Society for Optical Engineering.View/Download from: Publisher's site

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© 2015 SPIE. We describe the process of parametric amplification in a directional coupler of quadratically nonlinear and lossy waveguides, which belong to a class of optical systems with spatial parity-time (PT) symmetry in the linear regime. We identify a distinct spectral parity-time anti-symmetry associated with optical parametric interactions, and show that pump-controlled symmetry breaking can facilitate spectrally selective mode amplification in analogy with PT lasers. We also establish a connection between breaking of spectral and spatial mode symmetries, revealing the potential to implement unconventional regimes of spatial light switching through ultrafast control of PT breaking by pump pulses.

Setzpfandt, F, Solntsev, AS, Titchener, J, Wu, CW, Xiong, C, Pertsch, T, Schiek, R, Neshev, DN & Sukhorukov, AA 2015, 'Optically Tunable Entangled Photon State Generation in a Nonlinear Directional Coupler', Nonlinear Optics, NLO 2015.View/Download from: Publisher's site

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© 2015 OSA. We propose and experimentally demonstrate an all-optically tunable biphoton quantum light source using a nonlinear directional coupler. The source can generate high-fidelity N00N states, completely split states, and states with variable degrees of entanglement.

Antonosyan, DA, Solntsev, AS & Sukhorukov, AA 2015, 'Parity-Time Anti-Symmetric Parametric Amplifier with Ultrafast All-Optical Switching', Nonlinear Optics, NLO 2015.View/Download from: Publisher's site

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© 2015 OSA. We predict that directional coupler of nonlinear and lossy waveguides can perform ultrafast signal switching and parametric amplification, using the pump-controlled breaking of the parity-time anti-symmetry associated with nonlinear wave mixing.

Schiek, R, Setzpfandt, F, Solntsev, A & Neshev, DN 2015, 'Cubic and Quadratic Nonlinear Susceptibilities in Waveguides', Nonlinear Optics, NLO 2015.View/Download from: Publisher's site

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© 2015 OSA. Cubic and quadratic nonlinear susceptibility tensor elements in lithium niobate waveguides and optical fibers were determined from measurements of pulse envelopes and power-dependent phase-changes due to self-phase modulation.

Antonosyan, DA, Solntsev, AS & Sukhorukov, AA 2015, 'Parity-time anti-symmetric parametric amplifier', CLEO: QELS - Fundamental Science, CLEO_QELS 2015, p. 1551p.View/Download from: Publisher's site

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We predict that directional coupler of quadratically nonlinear and lossy waveguides can perform ultrafast signal switching and parametric amplification, using the pump-controlled breaking of the parity-time anti-symmetry associated with nonlinear wave mixing. © 2014 Optical Society of America.

Solntsev, AS & Sukhorukov, AA 2015, 'Complete conversion of one to two photons in dispersion-engineered nonlinear waveguides', CLEO: QELS - Fundamental Science, CLEO_QELS 2015, p. 1551p.View/Download from: Publisher's site

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We predict that complete deterministic conversion of one to two photons can be achieved at a finite propagation distance in specially engineered nonlinear waveguides, by designing quantum frequency mixing across a broad range of frequencies. © 2014 Optical Society of America.

Setzpfandt, F, Solntsev, AS, Titchener, J, Wu, CW, Xiong, C, Pertsch, T, Schiek, R, Neshev, DN & Sukhorukov, AA 2015, 'Optically tunable entangled photon state generation in a nonlinear directional coupler', CLEO: QELS - Fundamental Science, CLEO_QELS 2015, p. 1551p.View/Download from: Publisher's site

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We propose and experimentally demonstrate an all-optically tunable biphoton quantum light source using a nonlinear directional coupler. The source can generate high-fidelity N00N states, completely split states, and states with variable degrees of entanglement. © 2014 Optical Society of America.

Setzpfandt, F, Solntsev, AS, Titchener, J, Wu, CW, Xiong, C, Pertsch, T, Schiek, R, Neshev, DN & Sukhorukov, AA 2015, 'Tunable entangled photon states from a nonlinear directional coupler', Optics InfoBase Conference Papers.

Sergeyev, A, Geiss, R, Solntsev, AS, Sukhorukov, AA, Schrempel, F, Pertsch, T & Grange, R 2014, 'Maximizing the guided second-harmonic in lithium niobate nanowires', Optics InfoBase Conference Papers.

Setzpfandt, F, Solntsev, AS, Titchener, J, Wu, CW, Xiong, C, Pertsch, T, Schiek, R, Neshev, DN & Sukhorukov, AA 2014, 'Tunable entangled photon states from a nonlinear directional coupler', Optics InfoBase Conference Papers.

Solntsev, AS, Carletti, L, Xu, L, Poddubny, AN, De Angelis, C, Leo, G, Kivshar, YS, Neshev, DN & Sukhorukov, AA 2014, 'Photon-pair generation and sum-frequency conversion in nonlinear dielectric nanoresonators', Optics InfoBase Conference Papers.View/Download from: Publisher's site

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© OSA 2016. We predict photon-pair generation with non-classical angular correlations through spontaneous parametric down-conversion in quadratic nonlinear dielectric AlGaAs nanoresonators, and establish a quantum-classical correspondence with sum-frequency conversion.

Lenzini, F, Titchener, J, Fisher, P, Boes, A, Poddubny, AN, Kasture, S, Haylock, B, Villa, M, Mitchell, A, Solntsev, AS, Sukhorukov, AA & Lobino, M 2014, 'Measurement of photon-pair generation in waveguide arrays with specialized poling', Optics InfoBase Conference Papers.View/Download from: Publisher's site

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© OSA 2016. We present the realization of an inhomogeneously poled nonlinear waveguide array for the generation of photon pairs. The device is characterized by coincidence counting and a novel method based on reversed sum-frequency generation measurements.

Setzpfandt, F, Solntsev, AS, Pertsch, T & Sukhorukov, AA 2014, 'Nonlocal parametric down-conversion in multi-mode nonlinearwaveguide arrays', Optics InfoBase Conference Papers.

Sergeyev, A, Geiss, R, Solntsev, A, Kley, E-B, Pertsch, T & Grange, R 2014, 'Local fluorescent dye excitation with guided second-harmonic in lithium niobate nanowires', 2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), Conference on Lasers and Electro-Optics (CLEO), IEEE, San Jose, CA.

Stuetzer, S, Solntsev, AS, Nolte, S, Sipe, JE, Sukhorukov, AA & Szameit, A 2014, 'Simulation of two-mode squeezing in photonic waveguide lattices', 2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), Conference on Lasers and Electro-Optics (CLEO), IEEE, San Jose, CA.

Titchener, JG, Solntsev, AS & Sukhorukov, AA 2014, 'Generation of reconfigurable photon-pair states in aperiodically poled quadratic waveguide arrays', Nonlinear Photonics, NP 2014.

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© 2014 OSA. We propose special poling of quadratic nonlinear waveguide arrays enabling generation of photon pairs in any path entangled quantum state. Real-time switching between output quantum states can be achieved by varying classical input laser amplitudes.

Wu, CW, Solntsev, AS, Neshev, DN & Sukhorukov, AA 2014, 'Bell States Generation with Spatial Pump Filtering in Nonlinear Adiabatic Waveguiding Structures', 2014 OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE AND AUSTRALIAN CONFERENCE ON OPTICAL FIBRE TECHNOLOGY (OECC/ACOFT 2014), 19th OptoElectronics and Communication Conference (OECC) / 39th Australian Conference on Optical Fibre Technology (ACOFT), IEEE, Engineers Australia, Melbourne, AUSTRALIA, pp. 825-826.

Titchener, JG, Solntsev, AS & Sukhorukov, AA 2014, 'Integrated generation of photon pairs with all-optically reconfigurable quantum states', 2014 OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE AND AUSTRALIAN CONFERENCE ON OPTICAL FIBRE TECHNOLOGY (OECC/ACOFT 2014), 19th OptoElectronics and Communication Conference (OECC) / 39th Australian Conference on Optical Fibre Technology (ACOFT), IEEE, Engineers Australia, Melbourne, AUSTRALIA, pp. 652-653.

Wu, CW, Solntsev, AS, Neshev, DN & Sukhorukov, AA 2014, 'Biphoton generation and pump filtering in nonlinear adiabatic waveguiding structures', 2014 INTERNATIONAL CONFERENCE LASER OPTICS, International Conference on Laser Optics, IEEE, St Petersburg, RUSSIA.

Stützer, S, Solntsev, AS, Nolte, S, Sipe, JE, Sukhorukov, AA & Szameit, A 2014, 'Simulation of two-mode squeezing in photonic waveguide lattices', Optics InfoBase Conference Papers.

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We show how classical light can be used to simulate a nonclassical quantum process. Specially modulated optical waveguides were utilized to emulate two-mode squeezed vacuum states as the light amplitudes in our arrays correspond to the photon number distribution of the squeezed states. In our experiments demonstrate a transition from photon number growth to periodic Bloch oscillations for increased phase mismatch. © 2014 Optical Society of America.

Sergeyev, A, Geiss, R, Solntsev, A, Kley, EB, Pertsch, T & Grange, R 2014, 'Local fluorescent dye excitation with guided secondharmonic in lithium niobate nanowires', Optics InfoBase Conference Papers.

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We have generated second-harmonic (SH) signal in lithium niobate (LiNbO3) nanowires (NWs) to locally excite fluorescent dye in typical cell staining concentration. We show the second-order behavior of the SH signal in a NW with cross-section of 400x600 nm2. A guided SH power of 63±6 pW is needed to detect dye excitation in a 1 μg/ml DAPI dye solution. We also perform simulations to define that the LiNbO3 NWs with cross-sections down to 40×60nm2 are potentially able to produce the threshold amount of the SH power. © 2014 OSA.

Wu, CW, Solntsev, AS, Neshev, DN & Sukhorukov, AA 2014, 'Photon pair generation and pump filtering in nonlinear adiabatic waveguiding structures', OPTICS LETTERS, OPTICAL SOC AMER, pp. 953-956.View/Download from: Publisher's site

Sukhorukov, AA, Solntsev, AS, Kruk, SS, Neshev, DN & Kivshar, YS 2013, 'Coupled-Mode Theory for Nonlinear Plasmonic Structures and Metamaterials', 2013 7TH INTERNATIONAL CONGRESS ON ADVANCED ELECTROMAGNETIC MATERIALS IN MICROWAVES AND OPTICS (METAMATERIALS 2013), 7th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), IEEE, Bordeaux, FRANCE, pp. 241-243.

Graefe, M, Solntsev, AS, Keil, R, Tuennermann, A, Nolte, S, Sukhorukov, AA, Kivshar, YS & Szameit, A 2013, 'Photon pair generation in quadratic waveguide arrays: A classical optical simulation', 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE AND INTERNATIONAL QUANTUM ELECTRONICS CONFERENCE (CLEO EUROPE/IQEC), Conference on Lasers and Electro-Optics Europe & International Quantum Electronics Conference (CLEO/Europe-IQEC), IEEE, Munich, GERMANY.

Gräfe, M, Solntsev, AS, Keil, R, Tünnermann, A, Nolte, S, Sukhorukov, AA, Kivshar, YS & Szameit, A 2013, 'Photon pair generation in quadratic waveguide arrays: A classical optical simulation', Optics InfoBase Conference Papers.

Antonosyan, DA, Solntsev, AS, Sukhorukov, AA & Kivshar, YS 2013, 'Loss-tolerant photon-pair generation and quantum walks in nonlinear waveguide arrays', Optics InfoBase Conference Papers.

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We demonstrate that generation and quantum walks of biphotons with non-classical spatial correlations in nonlinear waveguide arrays is tolerant to losses for different pump regimes, and suggest quick loss characterization approach based on nonlinear spectroscopy. © OSA 2013.

Solntsev, AS, Setzpfandt, F, Clark, AS, Schreiber, A, Katzschmann, F, Schiek, R, Sohler, W, Silberhorn, C, Pertsch, T, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2013, 'Nonlinear quantum walks at the edge of quadraticwaveguide arrays', Optics InfoBase Conference Papers.

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We realize experimentally quantum walks of photon-pairs generated in a quadratic nonlinear waveguide array, and demonstrate that the pump distance from the edge strongly affects the spatial correlations through the interference from virtual biphoton sources. © 2013 Optical Society of America.

Wu, CW, Solntsev, AS, Neshev, DN & Sukhorukov, AA 2013, 'Photon pair generation in nonlinear adiabatic waveguiding structures', CLEO: QELS_Fundamental Science, CLEO:QELS FS 2013.

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We propose a novel scheme for broadband generation of photon pairs combined with efficient spatial pump filtering. This is achieved through spontaneous parametric downconversion in a system of nonlinear adiabatically coupled waveguides. © 2013 Optical Society of America.

Solntsev, AS & Sukhorukov, AA 2012, 'Combined frequency conversion and pulse compression in nonlinear tapered waveguides', OPTICS LETTERS, OPTICAL SOC AMER, pp. 446-448.View/Download from: Publisher's site

Graefe, M, Solntsev, AS, Keil, R, Tuennermann, A, Nolte, S, Szameit, A, Sukhorukov, AA & Kivshar, YS 2012, 'Classical Optical Simulation of Bi-Photon Generation in Quadratic Waveguide Arrays', 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), Conference on Lasers and Electro-Optics (CLEO), IEEE, San Jose, CA.

Solntsev, AS, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2012, 'Generation of photon pairs in cubic nonlinear waveguide arrays', Optics InfoBase Conference Papers.

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We analyze the quantum statistics of photon pair generation through spontaneous four-wave mixing in nonlinear waveguide arrays and predict pump power-controlled transition between bunching and anti-bunching correlations due to self-focusing of the pump beam. © 2012 Optical Society of America.

Solntsev, AS, Setzpfandt, F, Wu, A, Neshev, DN, Sukhorukov, AA, Kivshar, YS & Pertsch, T 2012, 'Observation of spontaneous parametric down conversion in LiNbO3 waveguide arrays', 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), Conference on Lasers and Electro-Optics (CLEO), IEEE, San Jose, CA.

Solntsev, AS, Setzpfandtc, F, Wu, A, Neshev, DN, Sukhorukov, AA, Kivshar, YS & Pertsch, T 2012, 'Observation of spontaneous parametric down conversion in LiNbO3 waveguide arrays', Optics InfoBase Conference Papers.

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We study experimentally the process of bi-photon generation through spontaneous parametric down-conversion in waveguide arrays. We show the formation of a unique spatial-spectral photon pattern and its dependence on the phase-matching conditions. © 2011 Optical Society of America.

Gräfe, M, Solntsev, AS, Keil, R, Tünnermann, A, Nolte, S, Szameit, A, Sukhorukov, AA & Kivshar, YS 2012, 'Classical optical simulation of bi-photon generation in quadratic waveguide arrays', Optics InfoBase Conference Papers.

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We suggest and demonstrate experimentally that evolution of classical light can simulate bi-photon generation through spontaneous parametric downconversion and correlated quantum walks in waveguide arrays, including violation of Bell's inequality. © 2011 Optical Society of America.

Solntsev, AS, Clark, AS, Setzpfandt, F, Collins, MJ, Xiong, C, Wu, A, Eilenberger, F, Schreiber, A, Katzschmann, F, Schiek, R, Sohler, W, Mitchell, A, Silberhorn, C, Eggleton, BJ, Pertsch, T, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2012, 'Simultaneous photon-pair generation and quantumwalks in a waveguide array', Frontiers in Optics, FIO 2012.

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We demonstrate experimentally simultaneous photon-pair generation and quantum walks in a PPLN waveguide array where the output photon correlations can be controlled by varying the pump laser wavelength, switching from classical to quantum statistics. © OSA 2012.

Solntsev, AS, Setzpfandt, F, Wu, A, Neshev, DN, Sukhorukov, AA, Kivshar, YS & Pertsch, T 2012, 'Observation of spontaneous parametric down conversion in LiNbO 3 waveguide arrays', CLEO: Applications and Technology, CLEO_AT 2012.

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We suggest and demonstrate experimentally that evolution of classicallight can simulate bi-photon generation through spontaneous parametric downconversion and correlated quantum walks in waveguide arrays, including violation of Bell's inequality. © 2011 Optical Society of America.

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We suggest and demonstrate experimentally that evolution of classicallight can simulate bi-photon generation through spontaneous parametric downconversion and correlated quantum walks in waveguide arrays, including violation of Bell's inequality. © 2011 Optical Society of America.

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Sukhorukov, AA, Solntsev, AS, Kruk, SS, Neshev, DN & Kivshar, YS 2012, 'Nonlinear coupled-mode theory for periodic waveguides and metamaterials with loss and gain', FIFTH INTERNATIONAL WORKSHOP ON THEORETICAL AND COMPUTATIONAL NANO-PHOTONICS (TACONA-PHOTONICS 2012), 5th International Workshop on Theoretical and Computational Nano-Photonics (TaCoNa-Photonics), AMER INST PHYSICS, Bad Honnef, GERMANY, pp. 80-82.View/Download from: Publisher's site

Solntsev, AS, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2012, 'Photon-pair generation in arrays of cubic nonlinear waveguides', OPTICS EXPRESS, OPTICAL SOC AMER, pp. 27441-27446.View/Download from: Publisher's site

Solntsev, AS, Setzpfandt, F, Wu, A, Neshev, DN, Sukhorukov, AA, Kivshar, YS & Pertsch, T 2012, 'Observation of spontaneous parametric down conversion in LiNbO3 waveguide arrays', 2012 Conference on Lasers and Electro-Optics, CLEO 2012.

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We suggest and demonstrate experimentally that evolution of classical light can simulate bi-photon generation through spontaneous parametric down-conversion and correlated quantum walks in waveguide arrays, including violation of Bell's inequality. © 2012 OSA.

Setzpfandt, F, Sukhorukov, AA, Neshev, DN, Schiek, R, Solntsev, AS, Eilenberger, F, Minardi, S, Ricken, R, Min, Y, Sohler, W, Kivshar, YS & Pertsch, T 2011, 'Nonlinear evolution of laser pulses in lithium niobate waveguide arrays', Optics InfoBase Conference Papers.

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We study experimentally and numerically the spatiotemporal evolution of short pulses in quadratic nonlinear waveguide arrays with coupled second-harmonic modes, revealing complex spectral transformations involving generation of new frequency components at the Brillouin zone edge. © 2011 Optical Society of America.

Solntsev, AS, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2011, 'Photon pair generation and quantum walks in arrays of quadratic nonlinear waveguides', Optics InfoBase Conference Papers.

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We study photon pair generation through spontaneous parametric down con- version accompanied by quantum walks in arrays of quadratic nonlinear waveguides and investigate various ways to control output photon correlations. © 2011 Optical Society of America.

Solntsev, AS, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2011, 'Photon pair generation and quantum walks in quadratic nonlinear waveguide arrays', Optics InfoBase Conference Papers, pp. 962-964.

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We study photon pair generation through spontaneous parametric down conversion ac-companied by quantum walks in arrays of quadratic nonlinear waveguides and investigate various ways to control output photon correlations. © 2011 AOS.

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Solntsev, AS, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2011, 'Photon pair generation and quantum walks in arrays of quadratic nonlinear waveguides', Optics InfoBase Conference Papers.

Solntsev, AS, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2011, 'Combined photon pair generation and quantum walks in quadratic nonlinear waveguide arrays', Optics InfoBase Conference Papers.

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We study photon pair generation through spontaneous parametric down conversion ac- companied by quantum walks in arrays of quadratic nonlinear waveguides and investigate various ways to control output photon correlations. © 2011 OSA.

Setzpfandt, F, Sukhorukov, AA, Neshev, DN, Schiek, R, Solntsev, AS, Ricken, R, Min, Y, Sohler, W, Kivshar, YS & Pertsch, T 2011, 'Spatio-temporal dynamics of laser pulses in lithium niobate waveguide arrays', 2011 Int. Quantum Electron. Conf., IQEC 2011 and Conf. Lasers and Electro-Optics, CLEO Pacific Rim 2011 Incorporating the Australasian Conf. Optics, Lasers and Spectroscopy and the Australian Conf., pp. 584-586.View/Download from: Publisher's site

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Solntsev, AS, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2011, 'Photon pair generation and quantum walks in quadratic nonlinear waveguide arrays', 2011 Int. Quantum Electron. Conf., IQEC 2011 and Conf. Lasers and Electro-Optics, CLEO Pacific Rim 2011 Incorporating the Australasian Conf. Optics, Lasers and Spectroscopy and the Australian Conf., pp. 962-964.View/Download from: Publisher's site

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We study photon pair generation through spontaneous parametric down conversion accompanied by quantum walks in arrays of quadratic nonlinear waveguides and investigate various ways to control output photon correlations. © 2011 IEEE.

Solntsev, AS, Neshev, DN & Schiek, R 2011, 'Time-resolved ultrafast all-optical switching in directional couplers with second-order nonlinearity', 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011.View/Download from: Publisher's site

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Nonlinear directional couplers (NLDC) allow for ultrafast all-optical switching. To date, various types of NLDCs have been studied, predominantly based on the Kerr [1] or cascaded quadratic nonlinearity [2] in second-harmonic generation (SHG). In the later case the switching can occur at lower powers because of a propagating-wave resonance effect. While a number of experiments to characterise the pulse propagation in Kerr-type couplers exist, till now the temporal behavior of short pulses in the NLDC with quadratic nonlinearity has never been studied experimentally. Several important questions such as the reason for incomplete switching and possible pulse compression factors remain unanswered. In this work we experimentally measure the pulse reshaping in a NLDC with second-order nonlinearity and show that pulse compression, break-up and back-switching play an important role in the switching process. © 2011 IEEE.

Solntsev, AS, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2011, 'Photon pair generation and quantum walks in arrays of quadratic nonlinear waveguides', 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011.View/Download from: Publisher's site

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Arrays of coupled optical waveguides provide a flexible platform for manipulation of optical beams and pulses [1]. Recently, the propagation of non-classical light in waveguide arrays has shown a surging attention. It was shown that quantum walks of correlated photon pairs realized through propagation in waveguide arrays can lead to nontrivial quantum correlations at the array output [2, 3]. However, all currently used schemes for quantum walks utilise correlated photon pairs generated externally to the array. Here, we propose and demonstrate numerically a novel scheme enabling simultaneous generation of correlated photon pair through spontaneous parametric downconversion (SPDC) and quantum walks inside a single photonic element - an array of quadratic nonlinear waveguides. This scheme avoids entirely the need for complex interfaces between the different photonic elements [3] and enables novel ways for control of the quantum correlations. © 2011 IEEE.

Solntsev, AS, Sukhorukov, AA & Kivshar, YS 2011, 'Modulated nanowire couplers for ultrashort pulses', 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011.View/Download from: Publisher's site

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High-index-contrast nanowires offer unique advantages for manipulation of optical pulses in compact photonic circuits, providing high field confinement and enabling precise dispersion engineering [1]. Furthermore, arrays of coupled nanowire waveguides [2-4] open possibilities for efficient spatio-temporal shaping and switching of optical pulses. In order to harness these opportunities, it is essential to develop approaches to simultaneously control temporal and spatial dispersion, as these characteristics can be strongly connected in nanophotonic structures. In this work, we suggest that spatio-temporal dispersion can be tailored by introducing periodic waveguide bending, and demonstrate through numerical simulations the application of this concept to suppress pulse break-up. © 2011 IEEE.

Setzpfandt, F, Sukhorukov, AA, Neshev, DN, Schiek, R, Solntsev, AS, Kivshar, YS & Pertsch, T 2011, 'Nonlinear pulse transformation and phase transitions in LiNbO3 waveguide arrays', 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011.View/Download from: Publisher's site

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Lithium niobate waveguide arrays (WGAs) [1] offer rich possibilities for all-optical shaping, switching, and routing of short optical pulses. In such systems, light from the fundamental wave (FW) is coupled by the 2 nonlinearity to the second harmonic (SH) giving rise to a strong cascaded quadratic nonlinearity. Recently a new type of phase transition in the nonlinear localised states was identified due to the competition between self-focusing and SH waveguide coupling, where the SH phase profile abruptly switches from in-phase to staggered structure as the input power is increased [2]. However, the temporal extent of the short laser pulses used in realistic experiments leads to a complex pulse reshaping in the course of propagation. Never studied experimentally before, such temporal dynamics is important for utilising the phase transition phenomenon for applications in optical switching. In this work, we study the spatio-temporal dynamics of pulses in lithium niobate WGAs and describe numerically and characterize experimentally the complex spatio-temporal nonlinear pulse transformations associated with the phase transition. © 2011 IEEE.

Solntsev, AS, Sukhorukov, AA, Neshev, DN, Iliew, R, Pertsch, T & Kivshar, YS 2010, 'High efficiency harmonic generation in LiNbO3 membranes', 2010 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) AND QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (QELS), Conference on Lasers and Electro-Optics (CLEO)/Quantum Electronics and Laser Science Conference (QELS), IEEE, San Jose, CA.

Solntsev, AS, Sukhorukov, AA, Neshev, DN, Iliew, R, Pertsch, T & Kivshar, YS 2010, 'High efficiency harmonic generation in LiNbO3 membranes', Optics InfoBase Conference Papers.

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We reveal simultaneous phase-and group-velocity matching for frequency dou- bling of ultra-short pulses at telecom wavelengths in LiNbO3 membranes. Fur-thermore, we predict complete phase-matched cascaded third-harmonic gener-ation for optimised membrane thickness. © 2009 Optical Society of America.

Solntsev, AS & Sukhorukov, AA 2010, 'Combined frequency conversion and pulse compression in nonlinear tapered waveguides', PROCEEDINGS OF 2010 CONFERENCE ON OPTOELECTRONIC AND MICROELECTRONIC MATERIALS AND DEVICES (COMMAND 2010), Conference on Optoelectronic and Microelectronic Materials and Devices (COMMAD), IEEE, Canberra, AUSTRALIA, pp. 89-90.

Solntsev, AS, Sukhorukov, AA, Neshev, DN, Iliew, R, Pertsch, T & Kivshar, YS 2010, 'High efficiency harmonic generation in LiNbO3 membranes', Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference: 2010 Laser Science to Photonic Applications, CLEO/QELS 2010.

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We reveal simultaneous phase- and group-velocity matching for frequency doubling of ultra-short pulses at telecom wavelengths in LiNbO3 membranes. Furthermore, we predict complete phase-matched cascaded third-harmonic generation for optimised membrane thickness. © 2009 Optical Society of America.

Projects

Selected projects

Optical Wavelength Conversion in Nonlinear Dielectric Nano-Resonators

Active photonic and plasmonic components based on parity-time symmetry