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Quantum Computing, Communication, and Simulation

Photon number resolving detection in commercially produced SNSPDs

Timothy M. Rambo, Jeremy S. Doredla, Hudson Jones, Leo Oshiro, Stephanie Boyd, Aaron Miller

Published Mar 12, 2024• 0 citations
Publisher

Abstract

Many quantum applications will benefit significantly from photon number resolving detection. However, photon number resolving detectors have been largely experimental devices implemented in laboratory settings. Recent advances in superconducting nanowire device fabrication and readout techniques have enabled the implementation of photon number resolution in widely deployable commercial single-photon detection systems. We will discuss progress in implementing photon number resolved detection with commercially produced superconducting nanowire single photon detectors via spatial multiplexing of independently instrumented detector elements and photon number dependent rise-time changes in single-element nanowire devices.

DOI
10.1117/12.2687215

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Many quantum applications will benefit significantly from photon number resolving detection. However, photon number resolving detectors have been largely experimental devices implemented in laboratory settings. Recent advances in superconducting nanowire device fabrication and readout techniques have enabled the implementation of photon number resolution in widely deployable commercial single-photon detection systems. We will discuss progress in implementing photon number resolved detection with commercially produced superconducting nanowire single photon detectors via spatial multiplexing of independently instrumented detector elements and photon number dependent rise-time changes in single-element nanowire devices.
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Superconducting nanowire single photon detectors (SNSPDs) are the detectors of choice in quantum optics applications due to their leading performances. To exploit their performances, great care must be devoted to efficiently couple light from a single-mode fiber to their small area, ~10 μm in size, at cryogenic temperature (~3K). In addition, to further improve the SNSPDs functionality, implementing the photon number resolving capability, arrays of spatially multiplexed SNSPDs, must be realized. We will discuss our results obtained for these two approaches.
Superconducting nanowire single-photon detectors (SNSPDs) have made a tremendous impact in recent years on a diverse array of research fields, by enabling researchers to access near unity system detection efficiency, fast count rates, and precise timing through commercial availability. Originally focused on discrete devices operating between the Near IR to Telecom wavelength regimes, the industry is expanding to the visible and mid-infrared domains while incorporating multi-detector structures and photon number resolving techniques. This talk will discuss developments at Quantum Opus in these areas as well as emerging applications in new fields for SNSPDs.