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arXiv:1011.1688 · Applied Physics Letters

Generation of correlated photon pairs in a chalcogenide As2S3 waveguide

C. Xiong, G. D. Marshall, Alberto Peruzzo, Mirko Lobino, A. S. Clark, D.-Y. Choi, Steve Madden, Chandra M. Natarajan, M. G. Tanner, Robert H. Hadfield, Sander N. Dorenbos, T. Zijlstra, Val Zwiller, Mark G. Thompson, J. G. Rarity, Michael J. Steel, Barry Luther‐Davies, Benjamin J. Eggleton, Jeremy L. O’Brien

Published Jan 31, 2011• 83 citations
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Abstract

We demonstrate a 1550 nm correlated photon-pair source in an integrated glass platform—a chalcogenide As2S3 waveguide. A measured pair coincidence rate of 80s−1 was achieved using 57 mW of continuous-wave pump. The coincidence to accidental ratio was shown to be limited by spontaneous Raman scattering effects that are expected to be mitigated by using a pulsed pump source.

DOI
10.1063/1.3549744

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We demonstrate a 1550 nm correlated photon-pair source in an integrated glass platform—a chalcogenide As2S3 waveguide. A measured pair coincidence rate of 80s−1 was achieved using 57 mW of continuous-wave pump. The coincidence to accidental ratio was shown to be limited by spontaneous Raman scattering effects that are expected to be mitigated by using a pulsed pump source.
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We theoretically investigate the generation of quantum-correlated photon pairs through spontaneous four-wave mixing in chalcogenide As(2)S(3) waveguides. For reasonable pump power levels, we show that such photonic-chip-based photon-pair sources can exhibit high brightness (approximately 1 x 10(9) pairs/s) and high correlation (approximately 100) if the waveguide length is chosen properly or the waveguide dispersion is engineered. Such a high correlation is possible in the presence of Raman scattering because the Raman profile exhibits a low gain window at a Stokes shift of 7.4 THz, though it is constrained due to multi-pair generation. As the proposed scheme is based on photonic chip technologies, it has the potential to become an integrated platform for the implementation of on-chip quantum technologies.
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