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

DOI to cite this document:
Kukushkin, I. V. ; Smet, J. H. ; Höppel, L. ; Waizmann, U. ; Riek, M. ; Wegscheider, Werner
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Date of publication of this fulltext: 11 Jan 2010 13:15


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 ...


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