ФТП, 2005, том 39, выпуск 1

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Resonant terahertz response of a slot diode with a two-dimensional electron channel

V.V.Popov, G.M.Tsymbalov, M.S.Shur*, W.Knap*+

Institute of Radio Engineering and Electronics (Saratov Division), Russian Academy of Sciences,
410019 Saratov, Russia
* Department of Electrical, Computer, and System Engineering and RPI/IBM Center for Broadband Data Transfer,
CII9015, Rensselaer Polytechnic Institute,
Troy, New York, 12180
+ GES CNRS-Universite Montpellier2 UMR 5650,
34900 Montpellier, France

(Получена 1 июня 2004 г. Принята к печати 14 июня 2004 г.)

Terahertz response of a slot diode with two-dimensional electron channel is calculated on the basis of the first principles of electromagnetism. It is shown that all characteristic electromagnetic lengths (scattering, absorption and extinction lengths) as well as the impedance of the diode exhibit resonances at the frequencies of plasmon excitation in the channel. The fundamental resonance behaves similar to the current resonance in a RLC circuit. A conclusion is drawn that a slot diode with two-dimensional electron channel provides a resonant circuit at terahertz frequencies that couples effectively to external electromagnetic radiation with loaded Q-factor exceeding unity even at room temperature. The diode resistance may be measured from contactless measurements of the characteristic electromagnetic lengths of the diode.

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