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Terahertz detectors for long wavelength multi-spectral imaging [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2007.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
32 pages : digital, PDF file
Additional Creators
Sandia National Laboratories, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The purpose of this work was to develop a wavelength tunable detector for Terahertz spectroscopy and imaging. Our approach was to utilize plasmons in the channel of a specially designed field-effect transistor called the grating-gate detector. Grating-gate detectors exhibit narrow-linewidth, broad spectral tunability through application of a gate bias, and no angular dependence in their photoresponse. As such, if suitable sensitivity can be attained, they are viable candidates for Terahertz multi-spectral focal plane arrays. When this work began, grating-gate gate detectors, while having many promising characteristics, had a noise-equivalent power (NEP) of only 10⁻⁵ W/√Hz. Over the duration of this project, we have obtained a true NEP of 10⁻⁸ W/√Hz and a scaled NEP of 10⁻⁹W/√Hz. The ultimate goal for these detectors is to reach a NEP in the 10{sup -9→-10}W/√Hz range; we have not yet seen a roadblock to continued improvement.
Report Numbers
E 1.99:sand2007-6354
sand2007-6354
Subject(s)
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Note
Published through SciTech Connect.
10/01/2007.
"sand2007-6354"
Reno, John Louis; Lyo, Sungkwun Kenneth; Wanke, Michael Clement; Shaner, Eric Arthur; Grine, Albert D.
Funding Information
AC04-94AL85000
View MARC record | catkey: 14709502