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Resonant detection of subterahertz and terahertz radiation by plasma waves in submicron field-effect transistors

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4 Author(s)
Knap, W. ; Center for Integrated Electronics and Electrical, Computer and System Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 121180-3590GES CNRS-Université Montpellier 2 34900 Montpellier, France ; Deng, Y. ; Rumyantsev, S. ; Shur, M.S.

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We report on the experiments on resonant photoresponse of the gated two-dimensional electron gas to the terahertz radiation. The visible-light-induced, metastable increase of the carrier density in the transistor channel shifts the resonance position to the higher gate voltages, in agreement with plasma wave detection theory. In this way, an unambiguous proof of the origin of the observed resonant detection is provided. The visible light illumination also leads to an increase of the electron mobility and, as a result, to an increase of the resonant detection quality factor. Resonant detection of the harmonics of the Gunn diode-based emission system is demonstrated up to 1.2 THz. © 2002 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:81 ,  Issue: 24 )