Heralded single photons from a silicon nanophotonic chip

Abstract

A highly nonlinear (≈3700/W·m) silicon coupled-resonator-optical-waveguide generated heralded single photons (g(2)(0) ≤ 0.19 ± 0.03) and widely-spaced photon pairs with coincidences-toaccidentals ratio >10 (cw) and >23 (pulsed), and outperformed a 54x longer silicon nanophotonic waveguide. © 2011 Optical Society of America.