Photon shot noise limited detection of terahertz radiation using a quantum capacitance detector

被引：24

作者：

Echternach, P. M. ^{[1
]}

Stone, K. J. ^{[1
]}

Bradford, C. M. ^{[1
]}

Day, P. K. ^{[1
]}

Wilson, D. W. ^{[1
]}

Megerian, K. G. ^{[1
]}

Llombart, N. ^{[2
]}

Bueno, J. ^{[3
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[2] Delft Univ Technol, Delft, Netherlands

[3] Space Res Org Netherlands, Utrecht, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 05期

基金：

美国国家航空航天局;

关键词：

SINGLE COOPER-PAIR; TES;

D O I：

10.1063/1.4817585

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We observed a sweep rate dependence of the quantum capacitance in a single Cooper-Pair box used as the readout of a Quantum Capacitance Detector. A model was developed that fits the data over five orders of magnitude in sweep rate and optical signal power and provides a natural calibration of the absorbed power. We are thereby able to measure the noise equivalent power of the detector as a function of absorbed power. We find that it is shot-noise-limited in detecting 1.5 THz photons with absorbed power ranging from 1 x 10(-22) W to 1 x 10(-17) W. (C) 2013 AIP Publishing LLC.

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页数：5

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