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arXiv · 1910.11435

Single-Photon Single-Flux Coupled Detectors

Murat Onen·Marco Turchetti·Brenden A. Butters·Mina R. Bionta·Phillip D. Keathley·Karl K. Berggren
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Abstract

In this work, we present a novel device that is a combination of a superconducting nanowire single-photon detector and a superconducting multi-level memory. We show that these devices can be used to count the number of detections through single-photon to single-flux conversion. Electrical characterization of the memory properties demonstrates single-flux quantum (SFQ) separated states. Optical measurements using attenuated laser pulses with different mean photon number, pulse energies and repetition rates are shown to differentiate single-photon detection from other possible phenomena, such as multi-photon detection and thermal activation. Finally, different geometries and material stacks to improve device performance, as well as arraying methods are discussed.

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Murat Onen, Marco Turchetti, Brenden A. Butters, Mina R. Bionta, Phillip D. Keathley, Karl K. Berggren. 2019-10-24. Single-Photon Single-Flux Coupled Detectors. https://doi.org/10.1021/acs.nanolett.9b04440

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