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arXiv · 1506.07922

Large-sensitive-area superconducting nanowire single-photon detector at 850 nm with high detection efficiency

Hao Li·Lu Zhang·Lixing You·Xiaoyan Yang·Weijun Zhang·Xiaoyu Liu·Sijing Chen·Zhen Wang·Xiaoming Xie
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Abstract

Satellite-ground quantum communication requires single-photon detectors of 850-nm wavelength with both high detection efficiency and large sensitive area. We developed superconducting nanowire single-photon detectors (SNSPDs) on one-dimensional photonic crystals, which acted as optical cavities to enhance the optical absorption, with a sensitive-area diameter of 50 um. The fabricated multimode fiber coupled NbN SNSPDs exhibited a maximum system detection efficiency (DE) of up to 82% and a DE of 78% at a dark count rate of 100 Hz at 850-nm wavelength as well as a system jitter of 105 ps.

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Hao Li, Lu Zhang, Lixing You, Xiaoyan Yang, Weijun Zhang, Xiaoyu Liu, Sijing Chen, Zhen Wang, Xiaoming Xie. 2015-06-25. Large-sensitive-area superconducting nanowire single-photon detector at 850 nm with high detection efficiency. https://doi.org/10.1364/oe.23.017301

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