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arXiv · 1609.00521

High-quality photonic entanglement for wavelength-multiplexed quantum communication based on a silicon chip

Florent Mazeas·Michele Traetta·Marco Bentivegna·Florian Kaiser·Djeylan Aktas·Weiwei Zhang·Carlos Alonso Ramos·Lutfi-Arif Bin-Ngah·Tommaso Lunghi·Éric Picholle·Nadia Belabas-Plougonven·Xavier Le Roux·Éric Cassan·Delphine Marris-Morini·Laurent Vivien·Grégory Sauder·Laurent Labonté·Sébastien Tanzilli
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Abstract

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 $\rm 500\,\mu W$ pump power. Additionally, the resonator has been engineered so as to generate a frequency comb structure 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.

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Florent Mazeas, Michele Traetta, Marco Bentivegna, Florian Kaiser, Djeylan Aktas, Weiwei Zhang, Carlos Alonso Ramos, Lutfi-Arif Bin-Ngah, Tommaso Lunghi, Éric Picholle, Nadia Belabas-Plougonven, Xavier Le Roux, Éric Cassan, Delphine Marris-Morini, Laurent Vivien, Grégory Sauder, Laurent Labonté, Sébastien Tanzilli. 2016-09-02. High-quality photonic entanglement for wavelength-multiplexed quantum communication based on a silicon chip. https://doi.org/10.1364/oe.24.028731

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