Hirotaka Terai

TL;DR: This work reports low error rate, GHz clocked QKD operation of an indium phosphide transmitter chip and a silicon oxynitride receiver chip—monolithically integrated devices using components and manufacturing processes from the telecommunications industry for large-scale deployment of quantum key distribution into future telecommunications networks.

TL;DR: In this article, a fiber-coupled niobium titanium nitride superconducting nanowire single photon detectors fabricated on thermally oxidized silicon substrates were presented.

TL;DR: In this article, a single-photon frequency converter based on quasi-phase matched LiNbO3 was used for frequency domain Hong-Ou-Mandel interference between a heralded single photon at 780 nm and a weak laser pulse at 1,522 nm in a single spatial mode.

TL;DR: High performance fiber-coupled niobium titanium nitride superconducting nanowire single photon detectors fabricated on thermally oxidized silicon substrates are presented.

TL;DR: A number of methods that have been pursued to develop superconducting nanowire single-photon detectors (SNSPDs) with attractive overall performance are described, including three systems that operate with >70% system detection efficiency and high maximum counting rates at wavelengths near 1550 nm.