Mid-infrared characterization of NbTiN superconducting nanowire single-photon detectors on silicon-on-insulator

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-11-18 DOI:10.1063/5.0237005

Adan Azem, Dmitry V. Morozov, Daniel Kuznesof, Ciro Bruscino, Robert H. Hadfield, Lukas Chrostowski, Jeff F. Young

引用次数: 0

Abstract

Superconducting nanowire single-photon detectors are widely used for detecting individual photons across various wavelengths from ultraviolet to near-infrared range. Recently, there has been increasing interest in enhancing their sensitivity to single photons in the mid-infrared spectrum, driven by applications in quantum communication, spectroscopy, and astrophysics. Here, we present our efforts to expand the spectral detection capabilities of U-shaped NbTiN-based superconducting nanowire single-photon detectors, fabricated in a 2-wire configuration on a silicon-on-insulator substrate, into the mid-infrared range. We demonstrate saturated internal detection efficiency extending up to a wavelength of 3.5 μm for a 5 nm thick and 50 nm wide NbTiN nanowire with a dark count rate less than 10 counts per second at 0.9 K and a rapid recovery time of 4.3 ns. The detectors are engineered for integration on waveguides in a silicon-on-insulator platform for compact, multi-channel device applications.

查看原文本刊更多论文

硅基绝缘体上的 NbTiN 超导纳米线单光子探测器的中红外特性分析

超导纳米线单光子探测器被广泛用于探测从紫外线到近红外各种波长的单个光子。最近，在量子通信、光谱学和天体物理学应用的推动下，人们对提高超导纳米线单光子探测器对中红外光谱中单光子的灵敏度越来越感兴趣。在此，我们介绍了如何将基于 U 型铌钛氮超导纳米线单光子探测器的光谱探测能力扩展到中红外范围。我们展示了厚度为 5 nm、宽度为 50 nm 的铌钛纳米线的饱和内部探测效率，其波长可达 3.5 μm，在 0.9 K 时的暗计数率小于每秒 10 个计数，快速恢复时间为 4.3 ns。该探测器可集成在绝缘体硅平台的波导上，用于紧凑型多通道器件应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.