A new magnetoplasmon sound wave in a two-dimensional electron gas under electromagnetic radiationC. Zhang and S. Hessami Pilehrood
School of Engineering Physics and Institute of Superconducting and Electronic Materials University of Wollongong - New South Wales 2522, Australia
received 19 August 2004; accepted in final form 1 December 2004
published online 14 January 2005
We report a new magnetoplasmon mode and a sound-like collective excitation in two-dimensional electronic systems under a weak magnetic field and a low-frequency electromagnetic radiation. The analysis is based on the exact time-dependent wave functions and the exact relation between response function with and without radiation. The new mode discovered here can be used as a generating mechanism of high-frequency radiation from a system whose characteristic energy is low.
77.22.Ch - Permittivity (dielectric function).
78.20.Bh - Theory, models, and numerical simulation.
78.30.Fs - III-V and II-VI semiconductors.
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