Abstract

A high-speed, low-loss modular cross-bar switching element suitable for single photons is demonstrated. Entanglement preserving voltage-driven switching of single photons is achieved with a unique combination of ultra-fast and low-loss characteristics (less than 50 ps 10%–90% transition time and greater than 90% transmission), and we present a roadmap towards even lower losses. The switch properties are well matched to the wavelength, bandwidth and lifetime of photons generated by spontaneous four-wave mixing sources also realized in silicon photonics. Such a switch can enable reconfigurability of each single photon and addressing of each time bin, and benefit future quantum photonic circuits.

Silicon photonic entangled photon-pair and heralded single photon generation with CAR > 12,000 and g⁽²⁾(0) < 0.006

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Opt. Express 25(26) 32995-33006 (2017)

Integrated electro-optic control of biphoton generation using hybrid photonics

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Photon-pair and heralded single photon generation initiated by a fraction of a 10 Gbps data stream

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Ultra-wide band (O to L) photonic integrated polymer cross-bar switch matrix

Yu Wang, Jang-Uk Shin, Netsanet Tessema, Menno van den Hout, Sjoerd van der Heide, Chigo Okonkwo, Hyun-Do Jung, and Nicola Calabretta
Opt. Lett. 46(21) 5324-5327 (2021)

Compact high-extinction tunable CROW filters for integrated quantum photonic circuits

Rakesh Ranjan Kumar, Xinru Wu, and Hon Ki Tsang
Opt. Lett. 45(6) 1289-1292 (2020)