Cryogenic amplifier with low input-referred voltage noise calibrated by shot noise measurement

doi:10.1088/1674-1056/27/6/060702

中国物理B ›› 2018, Vol. 27 ›› Issue (6): 60702-060702.doi: 10.1088/1674-1056/27/6/060702

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Cryogenic amplifier with low input-referred voltage noise calibrated by shot noise measurement

Wuhao Yang(杨伍昊), Jian Wei(危健)

International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China

收稿日期:2018-02-02 修回日期:2018-03-11 出版日期:2018-06-05 发布日期:2018-06-05
通讯作者: Wuhao Yang E-mail:yangwuhao@pku.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No.11474008),the National Key Research and Development Program of China (Grant No.2016YFA0300904),and the National Basic Research Program of China (Grant No.2011CBA00106).

Cryogenic amplifier with low input-referred voltage noise calibrated by shot noise measurement

Wuhao Yang(杨伍昊), Jian Wei(危健)

International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China

Received:2018-02-02 Revised:2018-03-11 Online:2018-06-05 Published:2018-06-05
Contact: Wuhao Yang E-mail:yangwuhao@pku.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No.11474008),the National Key Research and Development Program of China (Grant No.2016YFA0300904),and the National Basic Research Program of China (Grant No.2011CBA00106).

摘要/Abstract

摘要：

A low-noise cryogenic amplifier for the bandwidth from 100 kHz to 2 MHz with commercially available components is presented. The amplifier is mounted on the cold finger of our home-made liquid helium dipstick. The input impedance of the amplifier is 2 kΩ. The input-referred voltage noise of the amplifier at approximately 2 MHz is around 1 nV/√Hz. We demonstrate the performance of the amplifier by measuring shot noise on the Al/AlO_x/Al tunneling junction with resistance about 17 kΩ at liquid helium temperature.

关键词: cryogenic amplifier, shot noise, shadow evaporation, tunneling junction

Abstract:

Key words: cryogenic amplifier, shot noise, shadow evaporation, tunneling junction

中图分类号: (Cryogenics; refrigerators, low-temperature detectors, and other low-temperature equipment)

07.20.Mc

67.30.hr (Films) 73.23.-b (Electronic transport in mesoscopic systems)

杨伍昊, 危健. Cryogenic amplifier with low input-referred voltage noise calibrated by shot noise measurement[J]. 中国物理B, 2018, 27(6): 60702-060702.

Wuhao Yang(杨伍昊), Jian Wei(危健). Cryogenic amplifier with low input-referred voltage noise calibrated by shot noise measurement[J]. Chin. Phys. B, 2018, 27(6): 60702-060702.

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Cryogenic amplifier with low input-referred voltage noise calibrated by shot noise measurement

Cryogenic amplifier with low input-referred voltage noise calibrated by shot noise measurement

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