Correlated photon pair generation in low-loss double-stripe silicon nitride waveguides

Abstract

We demonstrate correlated photon pair generation via spontaneous four-wave\nmixing in a low-loss double-stripe silicon nitride waveguide with a\ncoincidence-to-accidental ratio over 10. The coincidence-to-accidental ratio is\nlimited by spontaneous Raman scattering, which can be mitigated by cooling in\nthe future. This demonstration suggests that this waveguide structure is a\npotential platform to develop integrated quantum photonic chips for quantum\ninformation processing.\n