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Proceedings Paper

Terahertz quantum well photodetectors
Author(s): H. C. Liu; H. Luo; C. Y. Song; Z. R. Wasilewski; A. J. SpringThorpe
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Paper Abstract

Many applications are expected in the terahertz spectral region and terahertz technology is viewed as one of the most important ones in the coming decade. We report on the design and simulated performance of quantum-well photodetectors for the terahertz (1 - 10 THz) or the very-far-infrared region. We also report on our experimental demonstration of GaAs/AlGaAs photodetectors with background limited infrared performance (BLIP). The device dark current characteristics were optimized by employing thick barriers to reduce inter-well tunneling. BLIP operations were observed for all samples (three in total) designed for different wavelengths. BLIP temperatures of 17, 13, and 12 K were achieved for peak detection frequencies at 9.7, 5.4, and 3.2 THz, respectively. Furthermore, we discuss areas of improvement to make these detectors a viable technology.

Paper Details

Date Published: 17 November 2005
PDF: 7 pages
Proc. SPIE 6010, Infrared to Terahertz Technologies for Health and the Environment, 601005 (17 November 2005); doi: 10.1117/12.629953
Show Author Affiliations
H. C. Liu, National Research Council Canada (Canada)
H. Luo, National Research Council Canada (Canada)
C. Y. Song, National Research Council Canada (Canada)
Z. R. Wasilewski, National Research Council Canada (Canada)
A. J. SpringThorpe, National Research Council Canada (Canada)


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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