Terahertz mixing in MgB2 microbolometers

被引：34

作者：

Cherednichenko, S. ^{[1
]}

Drakinskiy, V.

Ueda, K.

Naito, M.

机构：

[1] Chalmers, SE-41296 Gothenburg, Sweden

[2] NTT Corp, Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 02期

关键词：

D O I：

10.1063/1.2430928

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors report on a terahertz (600 GHz) mixing experiment with MgB2 microbolometers in the resistive state. The authors observed that for a 20 nm film a mixer gain bandwidth of 2.3 GHz can be achieved, corresponding to an energy relaxation time of 70 ps. The experimental results were analyzed using a two-temperature model. As a result, the phonon escape time of similar to 20 ps was deduced. At 1.6 THz the MgB2 mixer uncorrected noise temperature was 11 000 K. The obtained results show that MgB2 bolometers are good prospects for the terahertz range as both broadband mixers and fast direct detectors.

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页数：3

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