Single photon response of superconducting nanowire single photon detector

作     者：YOU LiXing SHEN XiaoFang YANG XiaoYan 

作者机构：State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology (SIMIT) Chinese Academy of Sciences Shanghai 200050 China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2010年第55卷第4期

页      面：441-445页

核心收录：

学科分类：080801[工学-电机与电器] 080901[工学-物理电子学] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0803[工学-光学工程] 

基　　金：supported by the National Natural Science Foundation of China (Grant No. 60801046) National Basic re-search Pogram of China(Grant No.2009CB929602) Science and Technology Commission of Shanghai Municipality (Grant Nos. 08dz1400702 & 08PJ1411200) 

主　　题：单光子探测器 超导薄膜 纳米线 反应 量子通信 高计数率 PD系统 密钥分配 

摘      要：Single photon detection is one of the key technologies for quantum key distribution in quantum communication. As a novel single photon detection technology, superconducting nanowire single photon detector (SNSPD) surpasses conventional semiconducting single photon detectors with high count rate and low dark count rate. In this article, we introduce SNSPD fabricated from NbN ultrathin superconducting film and lab-based SNSPD system. The characteristics of single photon response pulse of SNSPD are analyzed in detail. Also discussed is the relationship between waveform of single photon response and system bandwidth. Circuit model is made to analyze the performance of SNSPD. The simulation result agrees well with the experimental data. Those results are valuable for understanding the mechanism of SNSPD and building future SNSPD system for quantum communication.