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Handbook of Terahertz Technology for Imaging, Sensing and Communications by D Saeedkia

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5

Field effect transistors for terahertz applications

W. Knap and M.I. Dyakonov,     Laboratoire Charles Coulomb, Université Montpellier 2 and CNRS, France

Abstract:

This chapter gives an overview of the main physical ideas and experimental results concerning the application of field effect transistors (FETs) for the generation and detection of terahertz (THz) radiation. Resonant frequencies of the two-dimensional plasma oscillations in FETs increase with the reduction of the channel dimensions and for submicron gate length reach the THz range. When the mobility is high enough, the dynamics of a short channel FET at THz frequencies is dominated by plasma waves. This may result, on the one hand, in a direct current (dc) induced spontaneous ...

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