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Quantum Information and Measurement (QIM)

Towards MIR heralded photons via intermodal four wave mixing in silicon waveguides

Stefano Signorini, Sara Piccione, Giorgio Fontana, Lorenzo Pavesi, Mher Ghulinyan, Georg Pucker

Published Jan 1, 2019• 2 citations
Publisher

Abstract

We generate correlated photons with 600 nm spectral distance via intermodal four wave mixing in silicon. We want to demonstrate on-silicon-chip heralded single photons, beyond 2 µm, without post spectral filtering.
DOI
10.1364/qim.2019.t5a.11

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Single photon sources by heralding time correlated photons are described. By intermodal four wave mixing (FWM) in a silicon photon circuit, we generate a herald photon at 1260 nm and the heralded one beyond 2 um, with a coincidence to accidental ratio larger than 50 and a single photon purity of 0.75. The discrete band intermodal phase matching does not require further filtering to improve the purity of the single photon. Moreover, the intermodal FWM exhibits high controllability of the signal/idler wavelengths, that can be generated far from the Raman and pump noise, with improved noise filtering.
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