Demonstration of Polarization-Insensitive Superconducting Nanowire Single-Photon Detector With Si Compensation Layer

被引：20

作者：

Xu, Ruiying ^{[1
]}

Zheng, Fan ^{[1
]}

Qin, Defeng ^{[1
]}

Yan, Xiachao ^{[1
]}

Zhu, Guanghao ^{[1
]}

Kang, Lin ^{[1
]}

Zhang, Labao ^{[1
]}

Jia, Xiaoqing ^{[1
]}

Tu, Xuecou ^{[1
]}

Jin, Biaobing ^{[1
]}

Xu, Weiwei ^{[1
]}

Chen, Jian ^{[1
]}

Wu, Peiheng ^{[1
]}

机构：

[1] Nanjing Univ, Res Inst Superconductor Elect, Sch Elect Sci & Engn, Nanjing 210023, Jiangsu, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2017年 / 35卷 / 21期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Nanowire structure; polarization; single photon detector; EFFICIENCY; DESIGN; TIME;

D O I：

10.1109/JLT.2017.2752807

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Polarization sensitivity is an intrinsic characteristic of the superconducting nanowire single-photon detector (SNSPD). It is caused by the periodical meanderstructure of the SNSPD, and may severely limit the scope of the SNSPD's applications. In this study, we have designed and fabricated a SNSPD with much reduced polarization sensitivity, based on a previously published theoretical result that involves high refractive index compensation materials. Using a home-built broadband automatic measurement system, the device detection efficiencies of the fabricated SNSPD have been measured for wavelengths ranging from 1200 to 1700 nm. The measurement results show that the polarization sensitivity of the fabricated device is greatly reduced, with the device detection efficiencies at 1550 nm being 61% and 56% for cases of parallel and perpendicular polarizations, respectively. The measurement results are in good agreement with the numerical simulations.

引用

页码：4707 / 4713

页数：7

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