High quality entanglement on a chip-based frequency comb

作者：Mazeas F; Traetta M; Bentivegna M; Kaiser F; Aktas D; Zhang W; Ramos C A; Ngah L A; Lunghi T; Picholle E; Belabas Plougonven N; Le Roux X; Cassan E; Marris Morini D; Vivien L; Sauder G; Labonte L; Tanzilli S

来源：Optics Express, 2016, 24(25): 28731-28738.

DOI：10.1364/OE.24.028731

We report an efficient energy-time entangled photon-pair source based on four-wave mixing in a CMOS-compatible silicon photonics ring resonator. Thanks to suitable optimization, the source shows a large spectral brightness of 400 pairs of entangled photons /s/MHz for 500 mu W pump power, compatible with standard telecom dense wavelength division multiplexers. We demonstrate high-purity energy-time entanglement, i.e., free of photonic noise, with near perfect raw visibilities (> 98%) between various channel pairs in the telecom C-band. Such a compact source stands as a path towards more complex quantum photonic circuits dedicated to quantum communication systems.

• 出版日期2016-12-12