Superconducting nanowire single-photon detector on dielectric optical films for visible and near infrared wavelengths

被引：27
作者：
You, Lixing [1 ,2 ]
Li, Hao [1 ,2 ]
Zhang, Weijun [1 ,2 ]
Yang, Xiaoyan [1 ,2 ]
Zhang, Lu [1 ,2 ]
Chen, Sijing [1 ,2 ]
Zhou, Hui [1 ,2 ]
Wang, Zhen [1 ,2 ]
Xie, Xiaoming [1 ,2 ]
机构：
[1] Chinese Acad Sci, State Key Lab Funct Mat Informat, SIMIT, 865 Changning Rd, Shanghai 200050, Peoples R China
[2] CAS Ctr Excellence Superconducting Elect CENSE, Shanghai 200050, Peoples R China
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2017年 / 30卷 / 08期
基金：
中国国家自然科学基金;
关键词：
superconducting nanowire single-photon detectors; detection efficiency; optical absorption; TEMPERATURE-DEPENDENCE; REFRACTIVE-INDEX; HIGH-SPEED; EFFICIENCY; NM; CAVITY;
D O I：
10.1088/1361-6668/aa7495
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The detection efficiency (DE) of superconducting nanowire single-photon detectors (SNSPDs) at 1550 nm has been significantly improved in the past decades as a result of evolution of the optical structure, the materials, and the fabrication process. We discuss the general optical design for a high-efficiency SNSPD based on dielectric optical films that can detect wavelengths from visible to near infrared regions. This structure shows close-to-unity absorption and good insensitivity to the fine wavelength and the incident angle. We demonstrate an SNSPD specifically fabricated for the detection of 1064 nm wavelength with a maximal system DE of 87.4% +/- 3.7%. The DEs of the SNSPDs for visible and near infrared wavelengths are also summarized and compared with those of semiconducting detectors.
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页数：7
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