Kukushkin, I. V. and Smet, J. H. and Höppel, L. and Waizmann, U. and Riek, M. and Wegscheider, Werner
Ultrahigh-frequency surface acoustic waves for finite wave-vector spectroscopy of two-dimensional electrons.
Applied Physics Letters 85 (19), pp. 2526-2528.
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 methods described offer bright prospects for finite wave-vector spectroscopy of two-dimensional electrons in a noninvasive way up to wave numbers of 106 cm–1.
|Date:||8 November 2004|
|Institutions:|| Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
|Keywords:||aluminium compounds, gallium arsenide, III-V semiconductors, semiconductor quantum wells, surface acoustic wave transducers, interdigital transducers, high-frequency effects |
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||11 Jan 2010 13:15|
|Last Modified:||20 Jul 2011 22:13|