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Nature Research, Scientific Reports, 1(5), 2015

DOI: 10.1038/srep09616

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Single photon detector with high polarization sensitivity

Journal article published in 2015 by Qi Guo, Hao Li, LiXing You ORCID, WeiJun Zhang, Lu Zhang, Zhen Wang, XiaoMing Xie, Ming Qi
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractPolarization is one of the key parameters of light. Most optical detectors are intensity detectors that are insensitive to the polarization of light. A superconducting nanowire single photon detector (SNSPD) is naturally sensitive to polarization due to its nanowire structure. Previous studies focused on producing a polarization-insensitive SNSPD. In this study, by adjusting the width and pitch of the nanowire, we systematically investigate the preparation of an SNSPD with high polarization sensitivity. Subsequently, an SNSPD with a system detection efficiency of 12% and a polarization extinction ratio of 22 was successfully prepared.