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Journal of Infrared, Millimeter and Terahertz Waves 30, 12 (2009) 1319-1337
Field Effect Transistors for Terahertz Detection: Physics and First Imaging Applications
W. Knap1, Michel Dyakonov2, D. Coquillat1, F. Teppe1, N. Dyakonova1, J. Łusakowski, K. Karpierz, M. Sakowicz, G. Valusis, D. Seliuta, I. Kasalynas, A. El Fatimy, Y. Meziani, T. Otsuji

Resonant frequencies of the two-dimensional plasma in FETs increase with the reduction of the channel dimensions and can reach the THz range for sub-micron gate lengths. Nonlinear properties of the electron plasma in the transistor channel can be used for the detection and mixing of THz frequencies. At cryogenic temperatures resonant and gate voltage tunable detection related to plasma waves resonances, is observed. At room temperature, when plasma oscillations are overdamped, the FET can operate as an efficient broadband THz detector. We present the main theoretical and experimental results on THz detection by FETs in the context of their possible application for THz imaging.
1 :  GES - Groupe d'étude des semiconducteurs
2 :  LPTA - Laboratoire de Physique Théorique et Astroparticules
Physique/Matière Condensée/Systèmes mésoscopiques et effet Hall quantique

Physique/Matière Condensée/Autre
THz detectors - Field-effect transistors - Plasma waves - Imaging
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