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Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 33: Quantum Information: Solid State Systems II

Q 33.1: Talk

Wednesday, March 8, 2017, 14:30–14:45, P 3

Quantum photonics with superconducting single-photon detectors on silicon chips — •Carsten Schuck1,2, Xiang Guo1, Linran Fan1, Hojoong Jung1, Xiaosong Ma1, Menno Poot1, Chang-Ling Zou1, and Hong Tang11Department of Electrical Engineering, Yale University, New Haven, CT 06511, USA — 2Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Germany

Single photons in nanophotonic circuits on silicon chips hold great promise for scalable quantum information processing. Sources of non-classical light, integrated optical circuit components and waveguide-coupled single-photon detectors are essential ingredients of a photonic quantum processor. Here we report progress on realizing these components with standard semiconductor thin-film technology on silicon chips. We demonstrate quantum interference of photons from spontaneous parametric down conversion on an integrated directional coupler fabricated from nanophotonic silicon nitride waveguides. We observe two-photon interference with 97% visibility when measuring photon statistics with waveguide-coupled superconducting nanowire single-photon detectors directly on-chip [1]. Further we realize a spontaneous parametric down conversion source in micro-ring resonators made from aluminum nitride. Antibunching of heralded single-photons with high modal purity [2] highlights the suitability of this source for quantum information processing.

[1] Schuck te al., Nature Comm. 7, 10352 (2016).

[2] Guo te al., Light: Science & Applications 6, e16249 (2017).

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