Fast and accurate measurement of the polarization-dependent detection efficiency of superconducting nanowire single photon detector

Posted on 21.09.2022 - 20:33
Superconducting nanowire single photon detectors (SNSPDs) have been extensively investigated due to their superior characteristics, including high system detection efficiency, low dark count rate and short recovery time. The polarization sensitivity introduced by the meandering-type superconductor nanowires is an intrinsic property of SNSPD. In this paper, we propose a four-state polarization algorithm to characterize the optical response of SNSPDs without sweeping hundreds of points on the Poincaré sphere. It is shown that measurements involving only four polarization states are sufficient to reveal the two orthogonal detection efficiencies at a given wavelength. This model is validated by comparing the measured detection spectra with the spectra attained from sweeping 100 points on the Poincaré sphere and the simulated absorption spectra. The algorithm proposed here is hundreds of times faster than the traditional method and is promising for efficient and accurate characterization of the optical performance of SNSPDs.

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Fei, Yue; Ji, Tianhao; Zhang, Labao; Zhu, Guanghao; tan, jingrou; Lv, Jiayu; et al. (2022): Fast and accurate measurement of the polarization-dependent detection efficiency of superconducting nanowire single photon detector. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.6194008.v7
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AUTHORS (10)

Yue Fei
Tianhao Ji
Labao Zhang
Guanghao Zhu
jingrou tan
Jiayu Lv
qi chen
Guang He
Feiyan Li
Xiaohan Wang

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