Experimental investigation of the detection mechanism in WSi nanowire superconducting single photon detectors

被引：16

作者：

Gaudio, Rosalinda ^{[1
]}

Renema, Jelmer J. ^{[2
,4
]}

Zhou, Zili ^{[1
]}

Verma, Varun B. ^{[3
]}

Lita, Adriana E. ^{[3
]}

Shainline, Jeffrey ^{[3
]}

Stevens, Martin J. ^{[3
]}

Mirin, Richard P. ^{[3
]}

Nam, Sae Woo ^{[3
]}

van Exter, Martin P. ^{[2
]}

de Dood, Michiel J. A. ^{[2
]}

Fiore, Andrea ^{[1
]}

机构：

[1] Eindhoven Univ Technol, COBRA Res Inst, POB 513, NL-5600 MB Eindhoven, Netherlands

[2] Leiden Univ, Huygens Kamerlingh Onnes Lab, Niels Bohrweg 2, NL-2333 CA Leiden, Netherlands

[3] NIST, 325 Broadway, Boulder, CO 80305 USA

[4] Clarendon Lab, Parks Rd, Oxford OX1 3PU, England

来源：

APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 03期

关键词：

DETECTION EFFICIENCY; TOMOGRAPHY;

D O I：

10.1063/1.4958687

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We use quantum detector tomography to investigate the detection mechanism in WSi nanowire superconducting single photon detectors. To this purpose, we fabricated a 250 nm wide and 250 nm long WSi nanowire and measured its response to impinging photons with wavelengths ranging from lambda = 900 nm to lambda = 1650 nm. Tomographic measurements show that the detector response depends on the total excitation energy only. Moreover, for total absorbed energies >0.8 eV the current-energy relation is linear, similar to what was observed in NbN nanowires, whereas the current-energy relation deviates from linear behavior for total energies below 0.8 eV. Published by AIP Publishing.

引用

页数：4

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