We demonstrate degenerate, correlated photon-pair generation via slow-light-enhanced spontaneous four-wave mixing in a 96 μm long silicon photonic crystal waveguide. Our device represents a more than 50 times smaller footprint than silicon nanowires. We have achieved a coincidence-to-accidental ratio as high as 47 at a photon generation rate of 0.001 pairs per pulse and 14 at a photon generation rate of 0.023 pairs per pulse, which are both higher than the useful level of 10. This demonstration provides a path to generate indistinguishable photons in an ultracompact platform for future quantum photonic technologies.
© 2014 Optical Society of America
Original Manuscript: April 1, 2014
Revised Manuscript: May 9, 2014
Manuscript Accepted: May 10, 2014
Published: June 10, 2014
Jiakun He, Alex S. Clark, Matthew J. Collins, Juntao Li, Thomas F. Krauss, Benjamin J. Eggleton, and Chunle Xiong, "Degenerate photon-pair generation in an ultracompact silicon photonic crystal waveguide," Opt. Lett. 39, 3575-3578 (2014)