High-quality photonic entanglement based on a silicon chip

• URL: http://arxiv.org/abs/2002.10106v1
• Date: Mon, 24 Feb 2020 07:54:46 GMT
• Title: High-quality photonic entanglement based on a silicon chip
• Authors: Dorian Oser, S\'ebastien Tanzilli, Florent Mazeas, Carlos Alonso-Ramos, Xavier Le Roux, Gr\'egory Sauder, Xin Hua, Olivier Alibart, Laurent Vivien, \'Eric Cassan and Laurent Labont\'e
• Abstract summary: We report a telecom-compliant, device that integrates, on a single substrate, a nonlinear photon-pair generator and a passive pump rejection filter. Using standard channel-grid fiber demultiplexers, we demonstrate the first entanglement quantification of such a integrated circuit.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The fruitful association of quantum and integrated photonics holds the promise to produce, manipulate, and detect quantum states of light using compact and scalable systems. Integrating all the building-blocks necessary to produce high-quality photonic entanglement in the telecom wavelength range out of a single chip remains a major challenge, mainly due to the limited performance of on-chip light rejection filters. We report a stand-alone, telecom-compliant, device that integrates, on a single substrate, a nonlinear photon-pair generator and a passive pump rejection filter. Using standard channel-grid fiber demultiplexers, we demonstrate the first entanglement quantification of such a integrated circuit, showing the highest raw quantum interference visibility for energy-time entangled photons over two telecom-wavelength bands. Genuinely pure maximally entangled states can therefore be generated thanks to the high-level of noise suppression obtained with the pump filter. These results will certainly further promote the development of more advanced and scalable photonic-integrated quantum systems compliant with telecommunication standards.

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