Related papers: Near perfect two-photon interference out a down-converter on a silicon photonic chip

Near perfect two-photon interference out a down-converter on a silicon photonic chip

URL: http://arxiv.org/abs/2202.04316v1
Date: Wed, 9 Feb 2022 07:27:24 GMT
Title: Near perfect two-photon interference out a down-converter on a silicon photonic chip
Authors: Romain Dalidet, Florent Mazeas, Edgars Nitiss, Ozan Yakar, Anton Stroganov, S\'ebastien Tanzilli, Laurent Labont\'e, and Camille-Sophie Br\`es
Abstract summary: Integrated entangled photon-pair sources are key elements for enabling large-scale quantum photonic solutions. We report the first demonstration of an energy-time entangled photon-pair source through an optically induced second-order. This opens a new horizon for quantum technologies requiring the integration of a large variety of building functionalities on single chips.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Integrated entangled photon-pair sources are key elements for enabling large-scale quantum photonic solutions, and addresses the challenges of both scaling-up and stability. Here we report the first demonstration of an energy-time entangled photon-pair source based on spontaneous parametric down-conversion in silicon-based platform through an optically induced second-order ($\chi^{(2)}$) nonlinearity, ensuring type-0 quasi-phase-matching of fundamental harmonic and its second-harmonic inside the waveguide. The developed source shows a coincidence-to-accidental ratio of 1635 at 8 of $\mu$W pump power. Remarkably, we report two-photon interference with near-perfect visibility of 99.36$\pm1.94\%$, showing high-quality photonic entanglement without excess background noise. This opens a new horizon for quantum technologies requiring the integration of a large variety of building functionalities on single chips.

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