630纳米波长下的快速高效超导纳米线单光子探测器。

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

作者信息

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

出版信息

Appl Opt. 2019 Mar 10;58(8):1868-1872. doi: 10.1364/AO.58.001868.

DOI:10.1364/AO.58.001868

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.

摘要

快速高效的单光子探测器在生命科学和量子信息领域有着重要应用。在此，我们报告一种在介电镜上制造的串联连接的双超导纳米线雪崩光子探测器（SC2 - SNAP），其针对630纳米波长。该探测器在暗计数率为10赫兹时显示出84.8%的系统探测效率（SDE），在保持高SDE的同时具备快速探测速度，在SDE为60%时计数率达到53.9兆赫兹。这种快速高效的单光子探测器可能在荧光相关光谱学和量子密钥分发中找到应用。