Publications
73 results found
He J, Bell BA, Casas-Bedoya A, et al., 2015, Ultracompact quantum splitter of degenerate photon pairs, Optica, Vol: 2, Pages: 779-782, ISSN: 2334-2536
Integrated sources of indistinguishable photons have attracted a lot of attention because of their applications in quantum communication and optical quantum computing. Here, we demonstrate an ultracompact quantum splitter for degenerate photon pairs based on a monolithic silicon chip. It incorporates a Sagnac loop and a microring resonator with a total footprint of 0.011 mm2, generating and deterministically splitting indistinguishable photon pairs using two-photon interference. The ring resonator provides an enhanced photon generation rate, and the Sagnac loop ensures the photons travel through equal path lengths and interfere with the correct phase to enable the reversed Hong–Ou–Mandel (HOM) effect to take place. In the experiment, we observed a HOM dip visibility of 94.5±3.3%, indicating the generated photons are in a suitable state for further integration with other components for quantum applications, such as controlled-NOT gates.
major K, lien Y, polisseni C, et al., 2015, Growth of optical-quality anthracene crystals, doped with dibenzoterrylenefor controlled single photon production, Review of Scientific Instruments, Vol: 86, ISSN: 1089-7623
Dibenzoterrylene (DBT) molecules within a crystalline anthracene matrix show promise as quantum emitters for controlled, single photon production. We present the design and construction of a chamber in which we reproducibly grow doped anthracene crystals of optical quality that are several mm across and a few micrometres thick. We demonstrate control of the DBT concentration over the range 6 { 300 parts per trillion and show that these DBT molecules are stable single-photon emitters. We interpret our data with a simple model that provides some information on the vapour pressure of DBT.
Jizan I, Helt LG, Xiong C, et al., 2015, Bi-photon spectral correlation measurements from a silicon nanowire in the quantum and classical regimes, SCIENTIFIC REPORTS, Vol: 5, ISSN: 2045-2322
The growing requirement for photon pairs with specific spectral correlations in quantum optics experiments has created a demand for fast, high resolution and accurate source characterisation. A promising tool for such characterisation uses classical stimulated processes, in which an additional seed laser stimulates photon generation yielding much higher count rates, as recently demonstrated for a χ(2) integrated source in A. Eckstein et al. Laser Photon. Rev. 8, L76 (2014). In this work we extend these results to χ(3) integrated sources, directly measuring for the first time the relation between spectral correlation measurements via stimulated and spontaneous four wave mixing in an integrated optical waveguide, a silicon nanowire. We directly confirm the speed-up due to higher count rates and demonstrate that this allows additional resolution to be gained when compared to traditional coincidence measurements without any increase in measurement time. As the pump pulse duration can influence the degree of spectral correlation, all of our measurements are taken for two different pump pulse widths. This allows us to confirm that the classical stimulated process correctly captures the degree of spectral correlation regardless of pump pulse duration, and cements its place as an essential characterisation method for the development of future quantum integrated devices.
Zhang X, Jizan I, He J, et al., 2015, Enhancing the heralded single-photon rate from a silicon nanowire by time and wavelength division multiplexing pump pulses, OPTICS LETTERS, Vol: 40, Pages: 2489-2492, ISSN: 0146-9592
Xiong C, Collins MJ, Steel MJ, et al., 2015, Photonic Crystal Waveguide Sources of Photons for Quantum Communication Applications, IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, Vol: 21, ISSN: 1077-260X
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- Citations: 1
Lefrancois S, Clark AS, Eggleton BJ, 2015, Optimizing optical Bragg scattering for single-photon frequency conversion, PHYSICAL REVIEW A, Vol: 91, ISSN: 1050-2947
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- Citations: 13
Polisseni C, Kho KW, Grandi S, et al., 2015, Novel method of sub-wavelength thin film growth for single photon emission from dye molecules
Jizan I, Clark AS, Helt LG, et al., 2014, High-resolution measurement of spectral quantum correlations in the telecommunication band, OPTICS COMMUNICATIONS, Vol: 327, Pages: 45-48, ISSN: 0030-4018
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- Citations: 7
Clark AS, Xiong C, Tanzilli S, et al., 2014, Special Issue on Nonlinear Quantum Photonics, OPTICS COMMUNICATIONS, Vol: 327, Pages: 1-2, ISSN: 0030-4018
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- Citations: 2
Polisseni C, Kho KW, Grandi S, et al., 2014, Novel method of sub-wavelength thin film growth for single photon emission from dye molecules
Polisseni C, Kho KW, Grandi S, et al., 2014, Novel method of sub-wavelength thin film growth for single photon emission from dye molecules
Solntsev AS, Setzpfandt F, Clark AS, et al., 2014, Generation of nonclassical biphoton states through cascaded quantum walks on a nonlinear chip, Physical Review X, Vol: 4, ISSN: 2160-3308
We demonstrate a nonlinear optical chip that generates photons with reconfigurable nonclassical spatial correlations. We employ a quadratic nonlinear waveguide array, where photon pairs are generated through spontaneous parametric down-conversion and simultaneously spread through quantum walks between the waveguides. Because of the quantum interference of these cascaded quantum walks, the emerging photons can become entangled over multiple waveguide positions. We experimentally observe highly nonclassical photon-pair correlations, confirming the high fidelity of on-chip quantum interference. Furthermore, we demonstrate biphoton-state tunability by spatial shaping and frequency tuning of the classical pump beam.
He J, Clark AS, Collins MJ, et al., 2014, Degenerate photon-pair generation in an ultracompact silicon photonic crystal waveguide, OPTICS LETTERS, Vol: 39, Pages: 3575-3578, ISSN: 0146-9592
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- Citations: 13
Meany T, Ngah LA, Collins MJ, et al., 2014, Hybrid photonic circuit for multiplexed heralded single photons, LASER & PHOTONICS REVIEWS, Vol: 8, Pages: L42-L46, ISSN: 1863-8880
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- Citations: 74
Monat C, Grillet C, Collins M, et al., 2014, Integrated optical auto-correlator based on third-harmonic generation in a silicon photonic crystal waveguide, NATURE COMMUNICATIONS, Vol: 5, ISSN: 2041-1723
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- Citations: 76
Vo TD, He J, Magi E, et al., 2014, Chalcogenide fiber-based distributed temperature sensor with sub-centimeter spatial resolution and enhanced accuracy, OPTICS EXPRESS, Vol: 22, Pages: 1560-1568, ISSN: 1094-4087
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- Citations: 27
Bell BA, Tame MS, Clark AS, et al., 2013, Experimental characterization of cluster states using fibre sources
Xiong C, Vo TD, Collins MJ, et al., 2013, Bidirectional multiplexing of heralded single photons from a silicon chip, OPTICS LETTERS, Vol: 38, Pages: 5176-5179, ISSN: 0146-9592
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- Citations: 21
Carpenter J, Xiong C, Collins MJ, et al., 2013, Mode multiplexed single-photon and classical channels in a few-mode fiber, OPTICS EXPRESS, Vol: 21, Pages: 28794-28800, ISSN: 1094-4087
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- Citations: 31
Engin E, Bonneau D, Natarajan CM, et al., 2013, Photon pair generation in a silicon micro-ring resonator with reverse bias enhancement, OPTICS EXPRESS, Vol: 21, Pages: 27826-27834, ISSN: 1094-4087
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- Citations: 121
Husko CA, Clark AS, Collins MJ, et al., 2013, Multi-photon absorption limits to heralded single photon sources, SCIENTIFIC REPORTS, Vol: 3, ISSN: 2045-2322
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- Citations: 68
Collins MJ, Xiong C, Rey IH, et al., 2013, Integrated spatial multiplexing of heralded single-photon sources, NATURE COMMUNICATIONS, Vol: 4, ISSN: 2041-1723
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- Citations: 190
Bell B, Kannan S, McMillan A, et al., 2013, Multicolor Quantum Metrology with Entangled Photons, PHYSICAL REVIEW LETTERS, Vol: 111, ISSN: 0031-9007
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- Citations: 43
McMillan AR, Labonte L, Clark AS, et al., 2013, Two-photon interference between disparate sources for quantum networking, SCIENTIFIC REPORTS, Vol: 3, ISSN: 2045-2322
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- Citations: 15
Bell BA, Tame MS, Clark AS, et al., 2013, Experimental characterization of universal one-way quantum computing, NEW JOURNAL OF PHYSICS, Vol: 15, ISSN: 1367-2630
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- Citations: 21
Clark AS, Shahnia S, Collins MJ, et al., 2013, High-efficiency frequency conversion in the single-photon regime, OPTICS LETTERS, Vol: 38, Pages: 947-949, ISSN: 0146-9592
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- Citations: 48
Clark AS, Husko C, Collins MJ, et al., 2013, Heralded single-photon source in a III-V photonic crystal, OPTICS LETTERS, Vol: 38, Pages: 649-651, ISSN: 0146-9592
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- Citations: 28
Bell BA, Tame MS, Clark AS, et al., 2013, Experimental Characterization of Cluster States using Fibre Sources, Conference on Lasers and Electro-Optics Europe & International Quantum Electronics Conference (CLEO/Europe-IQEC), Publisher: IEEE
He J, Xiong C, Clark AS, et al., 2012, Effect of low-Raman window position on correlated photon-pair generation in a chalcogenide Ge<sub>11.5</sub>As<sub>24</sub>Se<sub>64.5</sub> nanowire, JOURNAL OF APPLIED PHYSICS, Vol: 112, ISSN: 0021-8979
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- Citations: 10
Collins MJ, Judge AC, Clark AS, et al., 2012, Broadband photon-counting Raman spectroscopy in short optical waveguides, APPLIED PHYSICS LETTERS, Vol: 101, ISSN: 0003-6951
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- Citations: 4
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