We demonstrate highly efficient photon-pair generation using an 8 mm long hydrogenated amorphous silicon (a-Si:H) waveguide in far-detuned multiple wavelength channels simultaneously, measuring a coincidence-to-accidental ratio as high as 400. We also characterize the contamination from Raman scattering and show it to be insignificant over a spectrum span of at least 5 THz. Our results highlight a-Si:H as a potential high-performance, CMOS-compatible platform for large-scale quantum applications, particularly those based on the use of multiplexed quantum signals.
© 2014 Optical Society of America
Original Manuscript: November 1, 2013
Revised Manuscript: January 3, 2014
Manuscript Accepted: January 3, 2014
Published: February 10, 2014
Ke-Yao Wang, Vesselin G. Velev, Kim Fook Lee, Abijith S. Kowligy, Prem Kumar, Mark A. Foster, Amy C. Foster, and Yu-Ping Huang, "Multichannel photon-pair generation using hydrogenated amorphous silicon waveguides," Opt. Lett. 39, 914-917 (2014)