Ultrahigh-frequency surface acoustic waves for finite wave-vector spectroscopy of two-dimensional electrons

DOI zum Zitieren dieses Dokuments:: 10.5283/epub.11813

Kukushkin, I. V. ; Smet, J. H. ; Höppel, L. ; Waizmann, U. ; Riek, M. ; Wegscheider, Werner

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Veröffentlichungsdatum dieses Volltextes: 11 Jan 2010 13:15

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Zusammenfassung

Ultrahigh-frequency (up to 24 GHz) surface acoustic waves were excited with short-period interdigital transducers and detected in GaAs/AlGaAs quantum wells with an optical scheme. We demonstrate that the transducers can be driven in a contactless fashion. Sets of two transducers permitted the coherent emission of surface acoustic waves and the creation of standing waves due to interference. The ...