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Conference on Lasers and Electro-Optics

Efficient single-photon-level quantum frequency conversion on a silicon nanophotonic chip

Qing Li, Marcelo Davanço, Kartik A. Srinivasan

Published Jan 1, 2015• 2 citations
Publisher

Abstract

We demonstrate frequency conversion of single-photon-level signals with an efficiency of 25% and signal-to-noise level >20:1, via four-wave-mixing Bragg scattering in a Si3N4 microring using low power (<20 mW per pump), continuous wave pump lasers.
DOI
10.1364/cleo_at.2015.jth5b.7

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Quantum communication networks require single photon frequency converters, whether to shift photons between wavelength channels, to shift photons to the operating wavelength of a quantum memory, or to shift photons of different wavelengths to be of the same wavelength, to enable a quantum interference. Here, we demonstrate frequency conversion of laser pulses attenuated to the single photon regime in an integrated silicon-on-insulator device using four-wave mixing Bragg scattering, with conversion efficiencies of up to 12%, or 32% after correcting for nonlinear loss created by the pump lasers. The frequency shift can be conveniently chosen by tuning of the pump frequencies. We demonstrate that such frequency conversion enables interference between photons at different frequencies.
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