Energy resolution of terahertz single-photon-sensitive bolometric detectors

被引：33

作者：

Santavicca, D. F. ^{[1
]}

Reulet, B. ^{[2
]}

Karasik, B. S. ^{[3
]}

Pereverzev, S. V. ^{[3
]}

Olaya, D. ^{[4
]}

Gershenson, M. E. ^{[4
]}

Frunzio, L. ^{[1
]}

Prober, D. E. ^{[1
]}

机构：

[1] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA

[2] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France

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

[4] Rutgers State Univ, Dept Phys, Piscataway, NJ 08854 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 08期

关键词：

bolometers; calibration; niobium; superconducting device noise; superconducting photodetectors; terahertz wave detectors; titanium; HOT-ELECTRON BOLOMETER; NOISE; SAFIR;

D O I：

10.1063/1.3336008

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report measurements of the energy resolution of ultrasensitive superconducting bolometric detectors. The device is a superconducting titanium nanobridge with niobium contacts. A fast microwave pulse is used to simulate a single higher-frequency photon, where the absorbed energy of the pulse is equal to the photon energy. This technique allows precise calibration of the input coupling and avoids problems with unwanted background photons. Present devices have an intrinsic full-width at half-maximum energy resolution of approximately 23 THz, near the predicted value due to intrinsic thermal fluctuation noise.

引用

页数：3

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