Ultimate response time in mid-infrared high-speed low-noise quantum cascade detectors

被引：24

作者：

Dougakiuchi, Tatsuo ^{[1
]}

Ito, Akio ^{[1
]}

Hitaka, Masahiro ^{[1
]}

Fujita, Kazuue ^{[1
]}

Yamanishi, Masamichi ^{[1
]}

机构：

[1] Hamamatsu Photon KK, Cent Res Lab, Hamakita Ku, 5000 Hirakuchi, Hamamatsu, Shizuoka 4348601, Japan

来源：

APPLIED PHYSICS LETTERS | 2021年 / 118卷 / 04期

关键词：

24;

D O I：

10.1063/5.0038147

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ultimate response time in the active region of quantum cascade detectors (QCDs) with a peak response wavelength of 4.5 mu m operating at room temperature is determined to be as short as one picosecond, by a comparison of the experimentally determined response time with the theoretical prediction based on an equivalent circuit model. The intrinsic response time of 1 ps is attributed to the electron transit time across only one module in the active region that contains a large number of cascade modules, that is, 45-90 cascade modules in the present QCDs. Therefore, the 3-dB cutoff frequency of the present QCDs is expected to be extremely high, that is, f(cutoff) similar to 160GHz (1/2 pi f(cutoff) similar to 1 ps).

引用

页数：6

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