Spectrum of plasma oscillations in structures with a periodically inhomogeneous two-dimensional electron plasma |
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Authors: | O R Matov O F Meshkov V V Popov |
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Institution: | (1) Saratov Branch of the Radio Engineering and Electronics Institute, Russian Academy of Sciences, 410019 Saratov, Russia |
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Abstract: | We develop a rigorous electrodynamic theory of plasma oscillations in a periodically inhomogeneous two-dimensional electron
system with a rectangular profile of the spatial modulation of the equilibrium electron concentration. We calculate the frequencies
and radiative damping of the main plasma-oscillation types with a zero reduced wave vector. We show that the frequency splitting
and the radiative damping of the oscillations are nonmonotonic functions of the modulation percentage and the ratio of the
widths of the bands of two-dimensional plasma with low and high electron concentrations. The results of calculations are compared
with experimental data and with the results of a perturbation theory developed in earlier work of other researchers. We discuss
the physical mechanism for the emergence of radiative damping of plasma oscillations.
Zh. éksp. Teor. Fiz. 113, 988–999 (March 1998) |
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