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17 November 2005 Heterojunction detectors for terahertz applications
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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.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. G. U. Perera "Heterojunction detectors for terahertz applications", Proc. SPIE 6010, Infrared to Terahertz Technologies for Health and the Environment, 601004 (17 November 2005);


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