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.
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A. G. U. Perera, 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); doi: 10.1117/12.629927; https://doi.org/10.1117/12.629927


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