A Superconducting Bolometer Antenna-Coupled to Terahertz Waves

被引：9

作者：

Cibella, S. ^{[1
]}

Carelli, P. ^{[2
]}

Castellano, M. G. ^{[1
]}

Foglietti, V. ^{[1
]}

Leoni, R. ^{[1
]}

Ortolani, M. ^{[1
]}

Torrioli, G. ^{[1
]}

机构：

[1] CNR, Ist Foton & Nanotechnol, I-00156 Rome, Italy

[2] Univ Aquila, Dipartimento Ingn Elettr, I-67100 Laquila, Italy

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2009年 / 154卷 / 5-6期

关键词：

Terahertz detector; Superconducting bolometer; HOT-SPOT MICROBOLOMETER;

D O I：

10.1007/s10909-009-9860-8

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electrical performances and the optical response of a superconducting hotspot air-bridge bolometer (SHAB) coupled through a planar antenna to Terahertz waves and operating in vacuum at about 4.2 K, have been measured. The SHAB consists of a narrow Nb air bridge, voltage biased to form, in the middle of the suspended Nb stripe, a resistive hotspot, whose volume is modulated by the incoming radiation. The signal resulting from the coupled optical power and the device noise performance have been measured by using a home made transimpedance amplifier operating at room temperature, resulting in an electrical NEP of about 40 fW/Hz(1/2). Passive detection of the 300 K blackbody radiation at frequency lower than 1.6 THz, band limited by a low-pass optical filters, has been successfully carried out by using a SHAB.

引用

页码：142 / 149

页数：8

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