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arXiv · 1201.2659

Telecommunications-band heralded single photons from a silicon nanophotonic chip

Marcelo Davanco·Jun Rong Ong·Andrea Bahgat Shehata·Alberto Tosi·Imad Agha·Solomon Assefa·Fengnian Xia·William M. J. Green·Shayan Mookherjea·Kartik Srinivasan
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Abstract

We demonstrate heralded single photon generation in a CMOS-compatible silicon nanophotonic device. The strong modal confinement and slow group velocity provided by a coupled resonator optical waveguide (CROW) produced a large four-wave-mixing nonlinearity coefficient gamma_eff ~4100 W^-1 m^-1 at telecommunications wavelengths. Spontaneous four-wave-mixing using a degenerate pump beam at 1549.6 nm created photon pairs at 1529.5 nm and 1570.5 nm with a coincidence-to-accidental ratio exceeding 20. A photon correlation measurement of the signal (1529.5 nm) photons heralded by the detection of the idler (1570.5 nm) photons showed antibunching with g^(2)(0) = 0.19 \pm 0.03. The demonstration of a single photon source within a silicon platform holds promise for future integrated quantum photonic circuits.

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Marcelo Davanco, Jun Rong Ong, Andrea Bahgat Shehata, Alberto Tosi, Imad Agha, Solomon Assefa, Fengnian Xia, William M. J. Green, Shayan Mookherjea, Kartik Srinivasan. 2012-01-12. Telecommunications-band heralded single photons from a silicon nanophotonic chip. https://doi.org/10.1063/1.4711253

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