We performed quantum interference measurements using photon pairs generated via cavity enhanced spontaneous four-wave mixing in an indium phosphide membrane micro-ring resonator which was optically pumped by a continuous-wave laser. The internal generation rate was estimated to be as high as 70 kHz at a coupled input power of 0.022 mW, and a two-photon quantum interference raw visibility of 78.4 ± 2% was observed.
Kumar, R. R., Raevskaia, M., Pogoretskii, V. G., Jiao, Y., & Tsang, H. K. (2019). Entangled photon pair generation from an InP membrane micro-ring resonator. Applied Physics Letters, 114(2), . https://doi.org/10.1063/1.5080397