We demonstrate correlated photon pair generation via spontaneous four-wave mixing in a low-loss double-stripe silicon nitride waveguide with a coincidence-to-accidental ratio over 10. The coincidence-to-accidental ratio is limited by spontaneous Raman scattering, which can be mitigated by cooling in the future. This demonstration suggests that this waveguide structure is a potential platform to develop integrated quantum photonic chips for quantum information processing.
@article{arxiv.1602.07915,
title = {Correlated photon pair generation in low-loss double-stripe silicon nitride waveguides},
author = {Xiang Zhang and Yanbing Zhang and Chunle Xiong and Benjamin J. Eggleton},
journal= {arXiv preprint arXiv:1602.07915},
year = {2016}
}