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Fast and high efficiency superconducting nanowire single-photon detector at 630 nm wavelength

Heqing Wang, Hao Li, Lixing You, Yong Wang, Lu Zhang, Xiaoyan Yang, Weijun Zhang, Zhen Wang, and Xiaoming Xie

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Abstract

Fast and high efficiency single-photon detectors have important applications in the fields of life science and quantum information. We report, herein, a serially connected two superconducting nanowire avalanche photon detector (SC2-SNAP) fabricated on a dielectric mirror aiming to 630 nm wavelength. This detector shows system detection efficiency (SDE) of 84.8% at a dark count rate of 10 Hz and offers fast detection speed while maintaining a high SDE, where the counting rate reaches 53.9 MHz at an SDE of 60%. This fast and high efficiency single-photon detector may find applications in fluorescence correlation spectroscopy and quantum key distribution.

© 2019 Optical Society of America

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