Journal of Infrared and Millimeter Waves, Volume. 41, Issue 4, 678(2022)
Characteristics of Ti transition-edge sensor based superconducting single-photon detectors
Ti TES-based superconducting single-photon detectors with different dimensions between 5 μm×5 μm and 20 μm×20 μm were developed. The measured system detection efficiency (ηsys) is 72% at 1550 nm, and energy resolution (ΔE) is 0.26 eV by integrating an optical cavity during the TES fabrication. Based on the two-fluid model, we extract the key parameters (i.e., temperature sensitivity, current sensitivity, heat capacity, et. al) of Ti TES-based superconducting single-photon detectors with different dimensions, and calculate the effective response time and ΔE, which are consistent with the measured ones. The obtained results show that it's possible to realize high ηsys and ΔE by optimizing TES dimension and critical temperature, paving the way for high performance single-photon detectors at telecommunication band.
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Yue GENG, Jia-Qiang ZHONG, Pei-Zhan LI, Wen ZHANG, Zheng WANG, Kang-Min ZHOU, Yuan REN, Wei MIAO, Qi-Jun YAO, Sheng-Cai SHI. Characteristics of Ti transition-edge sensor based superconducting single-photon detectors[J]. Journal of Infrared and Millimeter Waves, 2022, 41(4): 678
Category: Research Articles
Received: Dec. 4, 2021
Accepted: --
Published Online: Dec. 13, 2022
The Author Email: ZHANG Wen (wzhang@pmo.ac.cn), SHI Sheng-Cai (scshi@pmo.ac.cn)