Dr. Trong Toan Tran is a Chancellor's Postdoctoral Research Fellow at the School of Mathematical and Physical Science, Faculty of Science, UTS. He is a physicist with some background in Material Science and Chemical Engineering. His research interest includes quantum optics, nanophotonics, solid-state physics, and nanofabrication. Currently, Dr. Tran's actively researches novel quantum light sources and their integration into optical architectures to form high-performance and robust on-chip platforms, as well as their applications in secured communications, nanoscale sensing, and advanced photonic technologies.
Dr. Tran completed his doctoral thesis entitled “Quantum Emission from Hexagonal Boron Nitride” with Prof. Igor Aharonovich and Prof. Milos Toth. During his Ph.D. candidature, he has made a breakthrough in the field of quantum optics and materials science with his discovery of a class of room-temperature ultra-bright quantum light sources embedded in sheets of atomically thin crystals, known as “white-graphene” or hexagonal boron nitride. His work has opened up an avenue towards the fabrication of ultra-thin quantum optical devices that can be employed for a range of advanced quantum technologies and metrologies. In recognition of his PhD work, Dr. Tran has been given several prestigious prizes and awards, including the Chancellor’s Postdoctoral Research Fellowship (2018), UTS Chancellor’s Award for best thesis (2018), AIP Award for Postgraduate Excellence in Physics (2017), Best Poster Award at ICONN (2016), etc.
Outside the lab, Dr. Tran is also very keen on science communication. He loves to talk to non-expert audience about his research and other science-related stuff.
Member of Optical Society of America (OSA)
Can supervise: YES
- Quantum optics
- Solid-state physics and devices
- Foundation of Physics
- Physics in Actions
Abidi, IH, Mendelson, N, Tran, TT, Tyagi, A, Zhuang, M, Weng, LT, Özyilmaz, B, Aharonovich, I, Toth, M & Luo, Z 2019, 'Selective Defect Formation in Hexagonal Boron Nitride', Advanced Optical Materials, vol. 7, no. 13.View/Download from: Publisher's site
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Luminescent defects in hexagonal boron nitride (hBN) have emerged as promising single photon emitters (SPEs) due to their high brightness and robust operation at room temperature. The ability to create such emitters with well-defined optical properties is a cornerstone toward their integration into on-chip photonic architectures. Here, an effective approach is reported to fabricate hBN SPEs with desired emission properties in distinct spectral regions via the manipulation of boron diffusion through copper during atmospheric pressure chemical vapor deposition (CVD)—a process termed gettering. Using the gettering technique the resulting zero-phonon line is deterministically placed between the regions 550 and 600 nm or from 600 to 650 nm, paving the way for hBN SPEs with tailored emission properties. Additionally, rational control over the observed SPE density in the resulting films is demonstrated. The ability to control defect formation during hBN growth provides a cost effective means to improve the crystallinity of CVD hBN films, and lower defect density making it applicable to hBN growth for a wide-range of applications. The results are important to understand defect formation of quantum emitters in hBN and deploy them for scalable photonic technologies.
Duong, NMH, Glushkov, E, Chernev, A, Navikas, V, Comtet, J, Nguyen, MAP, Toth, M, Radenovic, A, Tran, TT & Aharonovich, I 2019, 'Facile Production of Hexagonal Boron Nitride Nanoparticles by Cryogenic Exfoliation.', Nano letters.View/Download from: UTS OPUS or Publisher's site
Fluorescent nanoparticles with optically robust luminescence are imperative to applications in imaging and labeling. Here we demonstrate that hexagonal boron nitride (hBN) nanoparticles can be reliably produced using a scalable cryogenic exfoliation technique with sizes below 10 nm. The particles exhibit bright fluorescence generated by color centers that act as atomic-size quantum emitters. We analyze their optical properties, including emission wavelength, photon-statistics, and photodynamics, and show that they are suitable for far-field super-resolution fluorescence nanoscopy. Our results provide a foundation for exploration of hBN nanoparticles as candidates for bioimaging, labeling, as well as biomarkers that are suitable for quantum sensing.
Mendelson, N, Xu, Z-Q, Toan, TT, Kianinia, M, Scott, J, Bradac, C, Aharonovich, I & Toth, M 2019, 'Engineering and Tuning of Quantum Emitters in Few-Layer Hexagonal Boron Nitride', ACS NANO, vol. 13, no. 3, pp. 3132-3140.View/Download from: UTS OPUS or Publisher's site
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
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.
Nikolay, N, Mendelson, N, Sadzak, N, Boehm, F, Toan, TT, Sontheimer, B, Aharonovich, I & Benson, O 2019, 'Very Large and Reversible Stark-Shift Tuning of Single Emitters in Layered Hexagonal Boron Nitride', PHYSICAL REVIEW APPLIED, vol. 11, no. 4.View/Download from: Publisher's site
Kianinia, M, Bradac, C, Sontheimer, B, Wang, F, Tran, TT, Nguyen, M, Kim, S, Xu, Z-Q, Jin, D, Schell, AW, Lobo, CJ, Aharonovich, I & Toth, M 2018, 'All-optical control and super-resolution imaging of quantum emitters in layered materials.', Nature communications, vol. 9, no. 1, pp. 874-874.View/Download from: UTS OPUS or Publisher's site
Layered van der Waals materials are emerging as compelling two-dimensional platforms for nanophotonics, polaritonics, valleytronics and spintronics, and have the potential to transform applications in sensing, imaging and quantum information processing. Among these, hexagonal boron nitride (hBN) is known to host ultra-bright, room-temperature quantum emitters, whose nature is yet to be fully understood. Here we present a set of measurements that give unique insight into the photophysical properties and level structure of hBN quantum emitters. Specifically, we report the existence of a class of hBN quantum emitters with a fast-decaying intermediate and a long-lived metastable state accessible from the first excited electronic state. Furthermore, by means of a two-laser repumping scheme, we show an enhanced photoluminescence and emission intensity, which can be utilized to realize a new modality of far-field super-resolution imaging. Our findings expand current understanding of quantum emitters in hBN and show new potential ways of harnessing their nonlinear optical properties in sub-diffraction nanoscopy.
Nguyen, M, Kim, S, Tran, TT, Xu, Z-Q, Kianinia, M, Toth, M & Aharonovich, I 2018, 'Nanoassembly of quantum emitters in hexagonal boron nitride and gold nanospheres.', Nanoscale, vol. 10, no. 5, pp. 2267-2274.View/Download from: UTS OPUS or Publisher's site
The assembly of quantum nanophotonic systems with plasmonic resonators is important for fundamental studies of single photon sources as well as for on-chip information processing. In this work, we demonstrate the controllable nanoassembly of gold nanospheres with ultra-bright narrow-band quantum emitters in 2D layered hexagonal boron nitride (hBN). We utilize an atomic force microscope (AFM) tip to precisely position gold nanospheres to close proximity to the quantum emitters and observe the resulting emission enhancement and fluorescence lifetime reduction. The extreme emitter photostability permits analysis at high excitation powers, and delineation of absorption and emission enhancement caused by the plasmonic resonators. A fluorescence enhancement of over 300% is achieved experimentally for quantum emitters in hBN, with a radiative quantum efficiency of up to 40% and a saturated count rate in excess of 5 × 106 counts per s. Our results are promising for the future employment of quantum emitters in hBN for integrated nanophotonic devices and plasmonic based nanosensors.
Tran, TT, Kianinia, M, Nguyen, M, Kim, S, Xu, ZQ, Kubanek, A, Toth, M & Aharonovich, I 2018, 'Resonant Excitation of Quantum Emitters in Hexagonal Boron Nitride', ACS Photonics, vol. 5, no. 2, pp. 295-300.View/Download from: UTS OPUS or Publisher's site
© 2017 American Chemical Society. Quantum emitters in layered hexagonal boron nitride (hBN) have recently attracted a great deal of attention as promising single photon sources. In this work, we demonstrate resonant excitation of a single defect center in hBN, one of the most important prerequisites for employment of optical sources in quantum information processing applications. We observe spectral line widths of an hBN emitter narrower than 1 GHz while the emitter experiences spectral diffusion. Temporal photoluminescence measurements reveal an average spectral diffusion time of around 100 ms. An on-resonance photon antibunching measurement is also realized. Our results shed light on the potential use of quantum emitters from hBN in nanophotonics and quantum information processing applications.
Xu, Z-Q, Elbadawi, C, Tran, TT, Kianinia, M, Li, X, Liu, D, Hoffman, TB, Nguyen, M, Kim, S, Edgar, JH, Wu, X, Song, L, Ali, S, Ford, M, Toth, M & Aharonovich, I 2018, 'Single photon emission from plasma treated 2D hexagonal boron nitride.', Nanoscale, vol. 10, no. 17, pp. 7957-7965.View/Download from: UTS OPUS or Publisher's site
Artificial atomic systems in solids are becoming increasingly important building blocks in quantum information processing and scalable quantum nanophotonic networks. Amongst numerous candidates, 2D hexagonal boron nitride has recently emerged as a promising platform hosting single photon emitters. Here, we report a number of robust plasma and thermal annealing methods for fabrication of emitters in tape-exfoliated hexagonal boron nitride (hBN) crystals. A two-step process comprising Ar plasma etching and subsequent annealing in Ar is highly robust, and yields an eight-fold increase in the concentration of emitters in hBN. The initial plasma-etching step generates emitters that suffer from blinking and bleaching, whereas the two-step process yields emitters that are photostable at room temperature with emission wavelengths greater than ∼700 nm. Density functional theory modeling suggests that the emitters might be associated with defect complexes that contain oxygen. This is further confirmed by generating the emitters via annealing hBN in air. Our findings advance the present understanding of the structure of quantum emitters in hBN and enhance the nanofabrication toolkit needed to realize integrated quantum nanophotonic circuits.
Dai, S, Tymchenko, M, Xu, Z-Q, Tran, TT, Yang, Y, Ma, Q, Watanabe, K, Taniguchi, T, Jarillo-Herrero, P, Aharonovich, I, Basov, DN, Tao, TH & Alù, A 2018, 'Internal Nanostructure Diagnosis with Hyperbolic Phonon Polaritons in Hexagonal Boron Nitride.', Nano letters, vol. 18, no. 8, pp. 5205-5210.View/Download from: UTS OPUS or Publisher's site
Imaging materials and inner structures with resolution below the diffraction limit has become of fundamental importance in recent years for a wide variety of applications. We report subdiffractive internal structure diagnosis of hexagonal boron nitride by exciting and imaging hyperbolic phonon polaritons. On the basis of their unique propagation properties, we are able to accurately locate defects in the crystal interior with nanometer resolution. The precise location, size, and geometry of the concealed defects are reconstructed by analyzing the polariton wavelength, reflection coefficient, and their dispersion. We have also studied the evolution of polariton reflection, transmission, and scattering as a function of defect size and photon frequency. The nondestructive high-precision polaritonic structure diagnosis technique introduced here can be also applied to other hyperbolic or waveguide systems and may be deployed in the next-generation biomedical imaging, sensing, and fine structure analysis.
Dietrich, A, Bürk, M, Steiger, ES, Antoniuk, L, Tran, TT, Nguyen, M, Aharonovich, I, Jelezko, F & Kubanek, A 2018, 'Observation of Fourier transform limited lines in hexagonal boron nitride', Physical Review B, vol. 98, no. 8.View/Download from: UTS OPUS or Publisher's site
© 2018 American Physical Society. Single defect centers in layered hexagonal boron nitride are promising candidates as single-photon sources for quantum optics and nanophotonics applications. However, spectral instability hinders many applications. Here, we perform resonant excitation measurements and observe Fourier transform limited linewidths down to ≈50 MHz. We investigated the optical properties of more than 600 single-photon emitters (SPEs) in hBN. The SPEs exhibit narrow zero-phonon lines distributed over a spectral range from 580 to 800 nm and with dipolelike emission with a high polarization contrast. Finally, the emitters withstand transfer to a foreign photonic platform, namely, a silver mirror, which makes them compatible with photonic devices such as optical resonators and paves the way to quantum photonics applications.
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
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.
Zhang, Y, Aughterson, R, Karatchevtseva, I, Kong, L, Toan, TT, Cejka, J, Aharonovich, I & Lumpkin, GR 2018, 'Uranyl oxide hydrate phases with heavy lanthanide ions: [Ln(UO2)(2)O-3 (OH)]center dot 0.5H(2)O (Ln = Tb, Dy, Ho and Yb)', NEW JOURNAL OF CHEMISTRY, vol. 42, no. 15, pp. 12386-12393.View/Download from: Publisher's site
Kianinia, M, Regan, B, Tawfik, SA, Tran, TT, Ford, MJ, Aharonovich, I & Toth, M 2017, 'Robust Solid-State Quantum System Operating at 800 K', ACS Photonics, vol. 4, no. 4, pp. 768-773.View/Download from: UTS OPUS or Publisher's site
© 2017 American Chemical Society. Realization of quantum information and communications technologies requires robust, stable solid-state single-photon sources. However, most existing sources cease to function above cryogenic or room temperature due to thermal ionization or strong phonon coupling, which impedes their emissive and quantum properties. Here we present an efficient single-photon source based on a defect in a van der Waals crystal that is optically stable and operates at elevated temperatures of up to 800 K. The quantum nature of the source and the photon purity are maintained upon heating to 800 K and cooling back to room temperature. Our report of a robust high-temperature solid-state single photon source constitutes a significant step toward practical, integrated quantum technologies for real-world environments.
Tawfik, SA, Ali, S, Fronzi, M, Kianinia, M, Tran, TT, Stampfl, C, Aharonovich, I, Toth, M & Ford, MJ 2017, 'First-principles investigation of quantum emission from hBN defects.', Nanoscale, vol. 9, no. 36, pp. 13575-13582.View/Download from: UTS OPUS or Publisher's site
Hexagonal boron nitride (hBN) has recently emerged as a fascinating platform for room-temperature quantum photonics due to the discovery of robust visible light single-photon emitters. In order to utilize these emitters, it is necessary to have a clear understanding of their atomic structure and the associated excitation processes that give rise to this single photon emission. Here, we performed density-functional theory (DFT) and constrained DFT calculations for a range of hBN point defects in order to identify potential emission candidates. By applying a number of criteria on the electronic structure of the ground state and the atomic structure of the excited states of the considered defects, and then calculating the Huang-Rhys (HR) factor, we found that the CBVN defect, in which a carbon atom substitutes a boron atom and the opposite nitrogen atom is removed, is a potential emission source with a HR factor of 1.66, in good agreement with the experimental HR factor. We calculated the photoluminescence (PL) line shape for this defect and found that it reproduces a number of key features in the experimental PL lineshape.
Tran, TT, Choi, S, Scott, JA, Xu, ZQ, Zheng, C, Seniutinas, G, Bendavid, A, Fuhrer, MS, Toth, M & Aharonovich, I 2017, 'Room-Temperature Single-Photon Emission from Oxidized Tungsten Disulfide Multilayers', Advanced Optical Materials, vol. 5, no. 5, pp. 1-5.View/Download from: UTS OPUS or Publisher's site
Robust quantum emitters fabricated by thermal oxidation of tungsten disulfide multilayers are reported. The emitters show robust, optically stable, linearly polarized luminescence at room temperature, can be modeled using a three‐level system, and exhibit moderate bunching. Overall, the results provide important insights into understanding of defect formation and quantum emitter activation in two‐dimensional materials.
Tran, TT, Wang, D, Xu, Z-Q, Yang, A, Toth, M, Odom, TW & Aharonovich, I 2017, 'Deterministic Coupling of Quantum Emitters in 2D Materials to Plasmonic Nanocavity Arrays.', Nano Letters, vol. 17, no. 4, pp. 2634-2639.View/Download from: UTS OPUS or Publisher's site
Quantum emitters in two-dimensional materials are promising candidates for studies of light-matter interaction and next generation, integrated on-chip quantum nanophotonics. However, the realization of integrated nanophotonic systems requires the coupling of emitters to optical cavities and resonators. In this work, we demonstrate hybrid systems in which quantum emitters in 2D hexagonal boron nitride (hBN) are deterministically coupled to high-quality plasmonic nanocavity arrays. The plasmonic nanoparticle arrays offer a high-quality, low-loss cavity in the same spectral range as the quantum emitters in hBN. The coupled emitters exhibit enhanced emission rates and reduced fluorescence lifetimes, consistent with Purcell enhancement in the weak coupling regime. Our results provide the foundation for a versatile approach for achieving scalable, integrated hybrid systems based on low-loss plasmonic nanoparticle arrays and 2D materials.
Schell, AW, Takashima, H, Tran, TT, Aharonovich, I & Takeuchi, S 2017, 'Coupling Quantum Emitters in 2D Materials with Tapered Fibers', ACS PHOTONICS, vol. 4, no. 4, pp. 761-767.View/Download from: UTS OPUS or Publisher's site
Tran, TT, Kianinia, M, Bray, K, Kim, S, Xu, Z-Q, Gentle, A, Sontheimer, B, Bradac, C & Aharonovich, I 2017, 'Nanodiamonds with photostable, sub-gigahertz linewidth quantum emitters', APL Photonics, vol. 2, no. 11, pp. 116103-116103.View/Download from: UTS OPUS or Publisher's site
Single-photon emitters with narrow linewidths are highly sought after for applications
in quantum information processing and quantum communications. In this
letter, we report on a bright, highly polarized near infrared single photon emitter
embedded in diamond nanocrystals with a narrow, sub-GHz optical linewidth
at 10 K. The observed zero-phonon line at ∼780 nm is optically stable under low
power excitation and blue shifts as the excitation power increases. Our results highlight
the prospect for using new near infrared color centers in nanodiamonds for
Choi, S, Toan, TT, Elbadawi, C, Lobo, C, Wang, X, Juodkazis, S, Seniutinas, G, Toth, M & Aharonovich, I 2016, 'Engineering and Localization of Quantum Emitters in Large Hexagonal Boron Nitride Layers', ACS APPLIED MATERIALS & INTERFACES, vol. 8, no. 43, pp. 29642-29648.View/Download from: Publisher's site
Elbadawi, C, Tran, TT, Kolíbal, M, Šikola, T, Scott, J, Cai, Q, Li, LH, Taniguchi, T, Watanabe, K, Toth, M, Aharonovich, I & Lobo, C 2016, 'Electron beam directed etching of hexagonal boron nitride.', Nanoscale, vol. 8, no. 36, pp. 16182-16186.View/Download from: UTS OPUS or Publisher's site
Hexagonal boron nitride (hBN) is a wide bandgap van der Waals material with unique optical properties that make it attractive for two dimensional (2D) photonic and optoelectronic devices. However, broad deployment and exploitation of hBN is limited by alack of suitable material and device processing and nano prototyping techniques. Here we present a high resolution, single step electron beam technique for chemical dry etching of hBN. Etching is achieved using H2O as a precursor gas, at both room temperature and elevated hBN temperatures. The technique enables damage-free, nano scale, iterative patterning of supported and suspended 2D hBN, thus opening the door to facile fabrication of hBN-based 2D heterostructures and devices.
Scott, JA, Totonjian, D, Martin, AA, Toan, TT, Fang, J, Toth, M, McDonagh, AM, Aharonovich, I & Lobo, CJ 2016, 'Versatile method for template-free synthesis of single crystalline metal and metal alloy nanowires', NANOSCALE, vol. 8, no. 5, pp. 2804-2810.View/Download from: UTS OPUS or Publisher's site
Toan, TT, Elbadawi, C, Totonjian, D, Lobo, CJ, Grosso, G, Moon, H, Englund, DR, Ford, MJ, Aharonovich, I & Toth, M 2016, 'Robust Multicolor Single Photon Emission from Point Defects in Hexagonal Boron Nitride', ACS NANO, vol. 10, no. 8, pp. 7331-7338.View/Download from: UTS OPUS or Publisher's site
Tran, TT, Bray, K, Ford, MJ, Toth, M & Aharonovich, I 2016, 'Quantum emission from hexagonal boron nitride monolayers.', Nature nanotechnology, vol. 11, no. 1, pp. 37-41.View/Download from: UTS OPUS or Publisher's site
Artificial atomic systems in solids are widely considered the leading physical system for a variety of quantum technologies, including quantum communications, computing and metrology. To date, however, room-temperature quantum emitters have only been observed in wide-bandgap semiconductors such as diamond and silicon carbide, nanocrystal quantum dots, and most recently in carbon nanotubes. Single-photon emission from two-dimensional materials has been reported, but only at cryogenic temperatures. Here, we demonstrate room-temperature, polarized and ultrabright single-photon emission from a colour centre in two-dimensional hexagonal boron nitride. Density functional theory calculations indicate that vacancy-related defects are a probable source of the emission. Our results demonstrate the unprecedented potential of van der Waals crystals for large-scale nanophotonics and quantum information processing.
Tran, TT, Zachreson, C, Berhane, AM, Bray, K, Sandstrom, RG, Li, LH, Taniguchi, T, Watanabe, K, Aharonovich, I & Toth, M 2016, 'Quantum Emission from Defects in Single-Crystalline Hexagonal Boron Nitride', PHYSICAL REVIEW APPLIED, vol. 5, no. 3.View/Download from: UTS OPUS or Publisher's site
Lienhard, B, Schroeder, T, Mouradian, S, Dolde, F, Toan, TT, Aharonovich, I & Englund, D 2016, 'Bright and photostable single-photon emitter in silicon carbide', OPTICA, vol. 3, no. 7, pp. 768-774.View/Download from: Publisher's site
Zhang, Y, Cejka, J, Lumpkin, GR, Toan, TT, Aharonovich, I, Karatchevtseva, I, Price, JR, Scales, N & Lu, K 2016, 'Hydrothermal synthesis, structures and properties of two uranyl oxide hydroxyl hydrate phases with Co(II) or Ni(II) ions', NEW JOURNAL OF CHEMISTRY, vol. 40, no. 6, pp. 5357-5363.View/Download from: Publisher's site
Zhang, Y, Clegg, JK, Lu, K, Lumpkin, GR, Tran, TT, Aharonovich, I, Scales, N & Li, F 2016, 'Uranium(VI) hybrid materials with [(UO2)(3)(mu(3)-O)(mu(2)-OH)(3)](+) as the sub-building unit via uranyl-cation interactions', CHEMISTRYSELECT, vol. 1, no. 1, pp. 7-12.View/Download from: UTS OPUS or Publisher's site
Zhang, Y, Karatchevtseva, I, Bhadbhade, M, Toan, TT, Aharonovich, I, Fanna, DJ, Shepherd, ND, Lu, K, Li, F & Lumpkin, GR 2016, 'Solvothermal synthesis of uranium(VI) phases with aromatic carboxylate ligands: A dinuclear complex with 4-hydroxybenzoic acid and a 3D framework with terephthalic acid', JOURNAL OF SOLID STATE CHEMISTRY, vol. 234, pp. 22-28.View/Download from: UTS OPUS or Publisher's site
Tran, TT, Fang, J, Zhang, H, Rath, P, Bray, K, Sandstrom, RG, Shimoni, O, Toth, M & Aharonovich, I 2015, 'Facile Self-Assembly of Quantum Plasmonic Circuit Components', ADVANCED MATERIALS, vol. 27, no. 27, pp. 4048-4053.View/Download from: UTS OPUS or Publisher's site
Pan, HH, Wang, ZK, Lim, HS, Ng, SC, Zhang, VL, Kuok, MH, Tran, TT & Lu, XM 2011, 'Hypersonic confined eigenvibrations of gold nano-octahedra', APPLIED PHYSICS LETTERS, vol. 98, no. 13.View/Download from: Publisher's site
Tran, TT & Lu, X 2011, 'Synergistic Effect of Ag and Pd Ions on Shape-Selective Growth of Polyhedral Au Nanocrystals with High-Index Facets', JOURNAL OF PHYSICAL CHEMISTRY C, vol. 115, no. 9, pp. 3638-3645.View/Download from: Publisher's site
Mendelson, N, Nikolay, N, Xu, ZQ, Tran, TT, Sadzak, N, Böhm, F, Sontheimer, B, Benson, O, Toth, M & Aharonovich, I 2019, 'Tuning of quantum emitters in hexagonal boron nitride', Optics InfoBase Conference Papers.View/Download from: Publisher's site
© 2019 The Author(s). We demonstrate two different techniques to tune quantum emitters in hBN, achieving record tuning magnitudes for a solid state quantum emitter, as well as dynamic and reversible modulation of the emitters through both methods).
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
© 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.
Toan, TT, Kianinia, M, Kim, S, Nguyen, M, Froch, J, Xu, Z-Q, Toth, M & Aharonovich, I 2018, 'Quantum Emitters in Flatland', 2018 INTERNATIONAL CONFERENCE ON OPTICAL MEMS AND NANOPHOTONICS (OMN), International Conference on Optical MEMS and Nanophotonics (OMN), IEEE, Lausanne, SWITZERLAND, pp. 1-2.
Tran, TT, Elbadawi, C, Totonjian, D, Lobo, CJ, Grosso, G, Moon, H, Englund, DR, Ford, MJ, Aharonovich, I & Toth, M 2017, 'Robust Multicolor Single Photon Emission from Point Defects in Hexagonal Boron Nitride', 2017 Conference on Lasers and Electro-Optics (CLEO), Conference on Lasers and Electro-Optics, IEEE, San Jose, CA.View/Download from: UTS OPUS
We demonstrates engineering of quantum emitters in hBN multi-layers using either electron beam irradiation or annealing. The defects exhibit a broad range of multicolor room-temperature single photon emissions across the visible and the near-infrared ranges.
Schell, AW, Takashima, H, Tran, TT, Aharonovich, I & Takeuchi, S 2017, 'Spectroscopy of single quantum emitters in hexagonal boron nitride using linear and non-linear excitation', 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
© 2017 IEEE. Excitation of single photon emitters via a two-photon process can be employed for high resolution imaging and has applications in quantum optics. Here, we present one- and two-photon excitation of single defects in hexagonal boron.
Elbadawi, C, Toan, TT, Shimoni, O, Totonjian, D, Lobo, CJ, Grosso, G, Moon, H, Englund, DR, Ford, MJ, Aharonovich, I & Toth, M 2016, 'Ultra-bright emission from hexagonal boron nitride defects as a new platform for bio-imaging and bio-labelling', SPIE BIOPHOTONICS AUSTRALASIA, SPIE BioPhotonics Australasia Conference, SPIE-INT SOC OPTICAL ENGINEERING, Adelaide, AUSTRALIA.View/Download from: UTS OPUS or Publisher's site
Dietrich, A, Bürk, M, Steiger, ES, Antoniuk, L, Tran, TT, Nguyen, M, Aharonovich, I, Jelezko, F & Kubanek, A 2018, 'Narrowband quantum emitters over large spectral range with Fourier-limited linewidth in hexagonal boron nitride'.
Single defect centers in layered hexagonal boron nitride (hBN) are promising
candidates as single photon sources for quantum optics and nanophotonics
applications. However, until today spectral instability hinders many
applications. Here, we perform resonant excitation measurements and observe
Fourier-Transform limited (FL) linewidths down to $\approx 50$ MHz. We
investigate optical properties of more than 600 quantum emitters (QE) in hBN.
The QEs exhibit narrow zero-phonon lines (ZPL) distributed over a spectral
range from 580 nm to 800 nm and with dipole-like emission with high
polarization contrast. The emission frequencies can be divided into four main
regions indicating distinct families or crystallographic structures of the QEs,
in accord with ab-initio calculations. Finally, the emitters withstand transfer
to a foreign photonic platform - namely a silver mirror, which makes them
compatible with photonic devices such as optical resonators and paves the way
to quantum photonics applications including quantum commmunications and quantum