Journal of Infrared and Millimeter Waves, Volume. 41, Issue 4, 678(2022)
Characteristics of Ti transition-edge sensor based superconducting single-photon detectors
Fig. 1. (a) Photo of Ti TES-based superconducting single-photon detector, L and W present the device length and width, CP is the overlap of contact pads. (b) TEM images of Ti TES, the periodic distribution structure is the dielectric mirror, on the left is the Nb/Ti overlapping area, on the right is the Ti active area. (c) IR image of light spot from the single-mode fiber and TES active area. (d) Measurement setup of TES-based superconducting single-photon detectors responding to an attenuated pulse signal, induced current is firstly amplified by SQUID
Fig. 2. (a) Current-voltage characteristics of TES-based superconducting single-photon detectors, (b) Joule power(P0=I0V0) at 0.3Rn as a function of TB
Fig. 3. (a) Calculated and measured τeff of TES-based superconducting single-photon detectors, (b) calculated C of TES-based superconducting single-photon detectors
Fig. 4. Response height histogram of TES-based superconducting single-photon detectors at 0.3Rn and 100 mK, the response height is normalized to the one responding to one 1 550 nm photon (a) No.3, (b) No.2, (c) No.1
Fig. 5. (a) Calculated and measured ΔE of TES-based superconducting single-photon detectors, (b) M2/α factor of TES-based superconducting single-photon detectors as a function of R0/Rn
Fig. 6. (a) Calculated response curves of TES-based superconducting single-photon detectors at 0.3Rn responding to a single 1 550 nm photon, (b) calculated and measured response height of No.3 as a function of R0/Rn responding to a single 1 550 nm photon.
Fig. 7. Calculated ΔE of TES with a dimension of 20 μm×20 μm as a function of TC
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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)