Enhancement of the nonlinear acoustoelectric interaction in a photoexcited plasma in a quantum well |
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| Authors: | A V Kalameitsev A O Govorov H -J Kutschera A Wixforth |
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| Institution: | 1. Institute of Semiconductor Physics, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 13, Novosibirsk, 630090, Russia
2. Sektion Physik der Ludwig-Maximilians-Universit?t and Center for NanoScience, Münich, D-80539, Germany
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| Abstract: | Nonlinear interaction of an intense surface acoustic wave (SAW) with a 2D electron-hole plasma generated by light in a semiconductor quantum well near a piezoelectric crystal is investigated. It is shown that, in a strongly nonlinear regime, the acoustoelectric interaction is enhanced because of the accumulation of carriers in the field of an intense SAW. In addition, in a strongly nonlinear regime, the dissipation of the acoustic wave energy increases and the sound velocity decreases. These dependences fundamentally differ from those observed in a unipolar plasma. For high sound intensities, analytical results are obtained. |
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