Bray, K, Kato, H, Previdi, R, Sandstrom, R, Ganesan, K, Ogura, M, Makino, T, Yamasaki, S, Magyar, AP, Toth, M & Aharonovich, I 2018, 'Single crystal diamond membranes for nanoelectronics.', Nanoscale, vol. 10, no. 8, pp. 4028-4035.View/Download from: UTS OPUS or Publisher's site
Single crystal, nanoscale diamond membranes are highly sought after for a variety of applications including nanophotonics, nanoelectronics and quantum information science. However, so far, the availability of conductive diamond membranes has remained an unreachable goal. In this work we present a complete nanofabrication methodology for engineering high aspect ratio, electrically active single crystal diamond membranes. The membranes have large lateral directions, exceeding 500 × 500 m2 and are only several hundreds of nanometers thick. We further realize vertical single crystal p-n junctions made from the diamond membranes that exhibit onset voltages of 10 V and a current of several mA. Moreover, we deterministically introduce optically active color centers into the membranes, and demonstrate for the first time a single crystal nanoscale diamond LED. The robust and scalable approach to engineer the electrically active single crystal diamond membranes offers new pathways for advanced nanophotonic, nanoelectronic and optomechanical devices employing diamond.
Bray, K, Cheung, L, Hossain, KR, Aharonovich, I, Valenzuela, SM & Shimoni, O 2018, 'Versatile multicolor nanodiamond probes for intracellular imaging and targeted labeling', JOURNAL OF MATERIALS CHEMISTRY B, vol. 6, no. 19, pp. 3078-3084.View/Download from: UTS OPUS or Publisher's site
Bray, K, Regan, B, Trycz, A, Previdi, R, Seniutinas, G, Ganesan, K, Kianinia, M, Kim, S & Aharonovich, I 2018, 'Single Crystal Diamond Membranes and Photonic Resonators Containing Germanium Vacancy Color Centers', ACS Photonics, vol. 5, no. 12, pp. 4817-4822.View/Download from: UTS OPUS or Publisher's site
Copyright © 2018 American Chemical Society. Single crystal diamond membranes that host optically active emitters are highly attractive components for integrated quantum nanophotonics. In this work we demonstrate bottom-up synthesis of single crystal diamond membranes containing germanium vacancy (GeV) color centers. We employ a lift-off technique to generate the membranes and perform chemical vapor deposition in the presence of a germanium source to realize the in situ doping. Finally, we show that these membranes are suitable for engineering of photonic resonators such as microdisk cavities with quality factors of 1500. The robust and scalable approach to engineer single crystal diamond membranes containing emerging color centers is a promising pathway for the realization of diamond integrated quantum nanophotonic circuits on a chip.
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
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.
Bray, K, Sandstrom, R, Elbadawi, C, Fischer, M, Schreck, M, Shimoni, O, Lobo, C, Toth, M & Aharonovich, I 2016, 'Localization of Narrowband Single Photon Emitters in Nanodiamonds', ACS APPLIED MATERIALS & INTERFACES, vol. 8, no. 11, pp. 7590-7594.View/Download from: UTS OPUS or Publisher's site
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
Bray, K, Previdi, R, Gibson, BC, Shimoni, O & Aharonovich, I 2015, 'Enhanced photoluminescence from single nitrogen-vacancy defects in nanodiamonds coated with phenol-ionic complexes', NANOSCALE, vol. 7, no. 11, pp. 4869-4874.View/Download from: UTS OPUS or Publisher's site