title: Photon pair generation in hydrogenated amorphous silicon microring resonators.
abstract: We generate photon pairs in a-Si:H microrings using a CW pump, and find the Kerr coefficient of a-Si:H to be 3.73 ± 0.25 × 10-17m2/W. By measuring the Q factor with coupled power we find that the loss in the a-Si:H micro-rings scales linearly with power, and therefore cannot originate from two photon absorption. Theoretically comparing a-Si:H and c-Si micro-ring pair sources, we show that the high Kerr coefficient of this sample of a-Si:H is best utilized for microrings with Q factors below 103, but that for higher Q factor devices the photon pair rate is greatly suppressed due to the first order loss.
authors.affiliation: Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory and Department of Electrical &Electronic Engineering, University of Bristol, BS8 1FD, UK.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Hemsley
authors.affiliation: Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory and Department of Electrical &Electronic Engineering, University of Bristol, BS8 1FD, UK.
authors.forename: Damien
authors.initials: D
authors.lastname: Bonneau
authors.affiliation: Hewlett-Packard Laboratories, 1501 Page Mill Rd., Palo Alto, CA 94304-1126, USA.
authors.forename: Jason
authors.initials: J
authors.lastname: Pelc
authors.affiliation: Hewlett-Packard Laboratories, 1501 Page Mill Rd., Palo Alto, CA 94304-1126, USA.
authors.forename: Ray
authors.initials: R
authors.lastname: Beausoleil
authors.affiliation: Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory and Department of Electrical &Electronic Engineering, University of Bristol, BS8 1FD, UK.
authors.forename: Jeremy L
authors.initials: JL
authors.lastname: O'Brien
authors.affiliation: Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory and Department of Electrical &Electronic Engineering, University of Bristol, BS8 1FD, UK.
authors.forename: Mark G
authors.initials: MG
authors.lastname: Thompson