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Orbital photogalvanic effects in quantum-confined structures

Karch, J. ; Tarasenko, S. A. ; Olbrich, P. ; Schönberger, T. ; Reitmaier, C. ; Plohmann, D. ; Kvon, Z. D. ; Ganichev, Sergey


We report on the circular and linear photogalvanic effects caused by free-carrier absorption of terahertz radiation in electron channels on (001)-oriented and miscut silicon surfaces. The photocurrent behaviour upon variation of the radiation polarization state, wavelength, gate voltage, and temperature is studied. We present the microscopic and phenomenological theory of the photogalvanic ...


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