Superconducting nanowire single-photon detectors based on amorphous tungsten germanide

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-04-21 DOI:10.1063/5.0264958

Shijie Yang, Ying Chen, Limin Sun, Hui Zhou, Yangmu Li, Jia Huang, Xiaoqing Zheng, Ruoyan Ma, Jiamin Xiong, Zhen Wan, Xiaoyu Liu, Hao Li, Jihong Zheng, Wei Peng, Xiaofu Zhang, Lixing You

引用次数: 0

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.

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基于非晶锗化钨的超导纳米线单光子探测器

在这篇论文中，我们表征了基于非晶锗化钨（W0.8Ge0.2）超导薄膜的超导纳米线单光子探测器（SNSPDs），它具有与非晶WSi相当的超导性能。纳米线宽度范围为60 ~ 90nm，填充系数为30%。所有制备的器件对波长达2 μm的红外光子具有饱和的本构探测效率，表明WGe是用于中远红外光子探测的snspd的理想候选器件。用室温放大器测量这些探测器的时序抖动，范围从127到234.5 ps。进一步的改进可以通过器件几何优化或实施低温放大器来实现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.