Generation of correlated photon pairs in a chalcogenide As2S3 waveguide
C. Xiong, G. D. Marshall, A. Peruzzo, M. Lobino, A. S. Clark, D.-Y., Choi, S. J. Madden, C. M. Natarajan, M. G. Tanner, R. H. Hadfield, S. N., Dorenbos, T. Zijlstra, V. Zwiller, M. G. Thompson, J. G. Rarity, M. J. Steel,, B. Luther-Davies, B. J. Eggleton, J. L. O'Brien
TL;DR
This paper reports the first integrated chalcogenide As2S3 waveguide source of correlated photon pairs at 1550 nm, achieving a notable coincidence rate and highlighting Raman scattering effects as a limiting factor.
Contribution
It introduces the first 1550 nm correlated photon-pair source in an integrated glass platform using a chalcogenide waveguide, advancing integrated quantum photonics.
Findings
Achieved a pair coincidence rate of 80 per second.
Coincidence to accidental ratio limited by Raman scattering.
Potential improvements with pulsed pump sources.
Abstract
We demonstrate the first 1550 nm correlated photon-pair source in an integrated glass platform-a chalcogenide As2S3 waveguide. A measured pair coincidence rate of 80 per second 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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