Design of ultra-low-noise AlMn transition edge sensor for far-infrared applications

Lingmei Zhang; Jiamin Sun; Lin Zhu; Yifei Zhang; Zhouhui Liu; Congzhan Liu; Xufang Li; Shibo Shu; Daikang Yan; He Gao; Zhengwei Li

doi:10.1117/12.3020143

16 August 2024 Design of ultra-low-noise AlMn transition edge sensor for far-infrared applications

Lingmei Zhang, Jiamin Sun, Lin Zhu, Yifei Zhang, Zhouhui Liu, Congzhan Liu, Xufang Li, Shibo Shu, Daikang Yan, He Gao, Zhengwei Li

Author Affiliations +

Proceedings Volume 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII; 131020S (2024) https://doi.org/10.1117/12.3020143
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

Future far-infrared (FIR) astronomy missions will need large detector arrays with high sensitivity. Low noise detectors with a noise equivalent power (NEP) of 3×10⁻¹⁹ to 1×10⁻²⁰ W/Hz1/2 for space-based continuum observations are needed, to be photon noise limited. Transition edge sensor (TES) as a type of sensitive low-temperature superconducting detector, has significant advantages in the measurement of broad band electromagnetic radiation, from millimeter waves to X-ray and gamma-rays. We propose a design of low noise TESs for FIR applications, with the NEP of lower than 3×10⁻¹⁹W/Hz^1/2. The key component on TES bolometer island is aluminum-manganese (AlMn) superconducting film, which has been proved that its critical temperature can be adjusted over a wide range by baking after the film deposition. We optimize the NEP of AlMn TESs by reducing the critical temperature to around 60 mK and designing the thermally isolating legs to reduce the thermal conductance effectively. The pixel design will be used as foundation in our future TES array designs and will benefit high-sensitive detector development.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Lingmei Zhang, Jiamin Sun, Lin Zhu, Yifei Zhang, Zhouhui Liu, Congzhan Liu, Xufang Li, Shibo Shu, Daikang Yan, He Gao, and Zhengwei Li "Design of ultra-low-noise AlMn transition edge sensor for far-infrared applications", Proc. SPIE 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII, 131020S (16 August 2024); https://doi.org/10.1117/12.3020143

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