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Distributed detection of quantum light: efficient photon number resolution without optical mode multiplication

Anton N. Vetlugin, Shuyu Dong, Filippo Martinelli, Cesare Soci

Published Jan 1, 2023• 0 citations
Publisher

Abstract

We demonstrate a new method of quantum light detection based on coherent absorption of a single optical mode in a distributed array of superconducting nanowire singlephoton detectors for efficient and scalable photon number resolution.
DOI
10.1364/cleo_fs.2023.fm2e.4

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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.