2026-10-14T12:47:22Z https://www.scidb.cn/oai

10.57760/sciencedb.j00113.00269 2025-12-05T11:23:29Z

2025-12-05 The data of article "Superconducting nanowire single photon detector with efficiency over 90% at 2 μm wavelength" doi:10.57760/sciencedb.j00113.00269 en We here report a high system detection efficiency (SDE) superconducting single-photon detector (SSPD) at 2 μm wavelength. The device integrates a SiO₂/Ta₂O₅ distributed Bragg reflector (DBR) and a sandwich-structured double-layer NbN nanowire to enhance optical absorption efficiency. A cold development technique is implemented to optimize the superconducting nanowires with sub-40-nm linewidths, thus enhancing intrinsic detection efficiency (IDE). The fabricated SSPD shows an SDE exceeding 90% at 2 μm wavelength. Moreover, the detector allows an operational working temperature of 2.2 K provided by a compact GM cryo-cooler. This detector delivers excellent performance at the 2 μm wavelength, and its optimized structural design implies promising potential for extending detection toward longer infrared bands. It thus holds value for advancing high-sensitivity quantum technologies, mid-infrared optical communications, and dark matter detection research.（A CSV file has been provided containing the plot data for all data charts.） superconducting single-photon detectors (SSPDs); system detection efficiency; near infrared 万震 黄佳 徐光照 丁钰 刘晓宇 潘一铭 徐洪鑫 李浩 尤立星 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset http://www.doi.org/10.1088/1674-1056/ae1b79 Science Data Bank