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Focusing of surface-acoustic-wave fields on (100) GaAs surfaces

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Focusing of surface-acoustic-wave fields on (100) GaAs surfaces

dc.contributor.author	Morais de Lima, Mauricio, Jr.
dc.contributor.author	Alsina, F.
dc.contributor.author	Seidel, W.
dc.contributor.author	Santos, P.V.
dc.date.accessioned	2013-11-26T13:08:28Z
dc.date.available	2013-11-26T13:08:28Z
dc.date.issued	2003
dc.identifier.citation	Morais de Lima, Mauricio, Jr. Alsina, F. Seidel, W. Santos, P. V. 2003 Focusing of surface-acoustic-wave fields on (100) GaAs surfaces Journal of Applied Physics 94 12 7848 7855
dc.identifier.uri	http://hdl.handle.net/10550/31434
dc.description.abstract	Focused surface-acoustic waves (SAWs) provide a way to reach intense acoustic fields for electroand optoacoustic applications on semiconductors. We have investigated the focusing of SAWs by interdigital transducers (IDTs)deposited on (100)-oriented GaAs substrates. The focusing IDTs have curved fingers designed to account for the acoustic anisotropy of the substrate. Different factors that affect focusing, such as the aperture angle and the configuration of the IDT fingers, were systematically addressed. We show that the focusing performance can be considerably improved by appropriate choice of the IDT metal pads, which, under appropriate conditions, create an acoustic waveguide within the IDT. We demonstrate the generation of narrow (full width at half maximum of approx 15 µm), high-frequency (0.5 GHz), continuous SAW beams with vertical displacement as high as 4 nm collimated over distances that exceed 100 µm.
dc.relation.ispartof	Journal of Applied Physics, 2003, vol. 94, num. 12, p. 7848-7855
dc.subject	Física
dc.subject	Ciència dels materials
dc.title	Focusing of surface-acoustic-wave fields on (100) GaAs surfaces
dc.type	journal article	es_ES
dc.date.updated	2013-11-26T13:08:28Z
dc.identifier.doi	10.1063/1.1625419
dc.identifier.idgrec	037344
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1063/1.1625419