Terahertz detection with tunneling quantum dot intersublevel photodetector

被引：61

作者：

Su, X. H. ^{[1
]}

Yang, J.

Bhattacharya, P.

Ariyawansa, G.

Perera, A. G. U.

机构：

[1] Univ Michigan, Dept Elect Engn & Comp Sci, Solid State Elect Lab, Ann Arbor, MI 48109 USA

[2] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2233808

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The characteristics of a tunnel quantum dot intersublevel photodetector, designed for the absorption of terahertz radiation, are described. The absorption region consists of self-organized In0.6Al0.4As/GaAs quantum dots with tailored electronic properties. Devices exhibit spectral response from 20 to 75 mu m (similar to 4 THz) with peak at similar to 50 mu m. The peak responsivity and specific detectivity of the device are 0.45 A/W and 10(8) cm Hz(1/2)/W, respectively, at 4.6 K for an applied bias of 1 V. Response to terahertz radiation is observed up to 150 K. (c) 2006 American Institute of Physics.

引用

页数：3

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