Twin-photon generation in a silicon nitride microresonator

Franz Pacher, Haochen Yan, Alekhya Ghosh +8

Photonic chips with silicon nitride ($\mathrm{S}{\mathrm{i}}_3{\mathrm{N}}_4$) microring resonators are well established as heralded single-photon sources, but their operation as frequency-degenerate tw…