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Proceedings Paper

Heterojunction detectors for terahertz applications
Author(s): A. G. U. Perera
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Paper Abstract

Terahertz imaging is finding a wide range of interest in biology, communications, environment, medicine, security, and space applications. Here results are presented on heterojunction based terahertz detectors covering the range from 1-60 THz. One set of detectors is based on free carrier absorption, followed by internal photoemission aver a workfunction at the interface. These detectors can be produced using any III/V materials and the threshold frequency can be tailored by adjusting the material composition. Examples of GaAs/AlGaAs based detectors with thresholds ranging from 2.3 to 4.2 THz and GaN/AlGaN detectors with threshold of 1 THz are presented. Also briefly mentioned are the quantum dot detectors for the terahertz range.

Paper Details

Date Published: 18 November 2005
PDF: 9 pages
Proc. SPIE 6010, Infrared to Terahertz Technologies for Health and the Environment, 601004 (18 November 2005); doi: 10.1117/12.629927
Show Author Affiliations
A. G. U. Perera, Georgia State Univ. (United States)


Published in SPIE Proceedings Vol. 6010:
Infrared to Terahertz Technologies for Health and the Environment
Alexey A. Belyanin; Rebekah A. Drezek; Claire F. Gmachl, Editor(s)

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