Superconducting nanowire single-photon detectors based on amorphous tungsten germanide
Abstract
In this Letter, we characterized superconducting nanowire single-photon detectors (SNSPDs) based on amorphous tungsten germanide (W0.8Ge0.2) superconducting films, which exhibit superconducting properties comparable to those of amorphous WSi. The nanowire width ranges from 60 to 90 nm, with a fixed filling factor of 30%. All fabricated devices exhibit saturated intrinsic detection efficiency for infrared photons with wavelengths up to 2 μm, indicating that WGe is a promising candidate for SNSPDs designed for mid- and far-infrared photon detection. The timing jitter of these detectors, measured with a room-temperature amplifier, ranges from 127 to 234.5 ps. Further improvements can be achieved through device geometry optimization or the implementation of cryogenic amplifiers.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (16)
Shijie Yang
State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials, School of Chemical Engineering
Ying Chen
Limin Sun
Instrumental Analysis Center
Hui Zhou
Department of Chemistry and Materials
Yangmu Li
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences 5 , Beijing 100190,
Jia Huang
Xiaoqing Zheng
Shanghai Key Laboratory of Superconductor Integrated Circuit Technology 2 , 865 Changning Road, Shanghai 200050
Ruoyan Ma
Shanghai Key Laboratory of Superconductor Integrated Circuit Technology 2 , 865 Changning Road, Shanghai 200050
Jiamin Xiong
Shanghai Key Laboratory of Superconductor Integrated Circuit Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences 1 , Shanghai 200050,
Zhen Wan
Shanghai Key Laboratory of Superconductor Integrated Circuit Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences 1 , Shanghai 200050,
Xiaoyu Liu
Optogenetics & Synthetic Biology Interdisciplinary Research Center, Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai 200237, China
Hao Li
Jihong Zheng
Department of Orthopedics and Precision Research Center for Refractory Diseases, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine
Wei Peng
Andlinger Center for Energy and the Environment, Princeton University
Xiaofu Zhang
Lixing You