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

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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.uri http://dx.doi.org/10.1063/1.1625419
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.rights.uri info:eu-repo/semantics/openAccess
dc.source 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.subject Física
dc.subject Ciència dels materials
dc.title Focusing of surface-acoustic-wave fields on (100) GaAs surfaces
dc.type info:eu-repo/semantics/article
dc.date.updated 2013-11-26T13:08:28Z
dc.identifier.doi http://dx.doi.org/10.1063/1.1625419
dc.identifier.idgrec 037344

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