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Leaky wedge acoustic waves in single-crystal silicon

  • In anisotropic media, the existence of leaky surface acoustic waves is a well-known phenomenon. Very recently, their analogs at the apex of an elastic silicon wedge have been found in experiments using laser-ultrasonics. In addition to a wedge-wave (WW) pulse with low speed, a pseudo-wedge wave (p-WW) pulse was found with a velocity higher than the velocity of shear bulk waves, propagating in theIn anisotropic media, the existence of leaky surface acoustic waves is a well-known phenomenon. Very recently, their analogs at the apex of an elastic silicon wedge have been found in experiments using laser-ultrasonics. In addition to a wedge-wave (WW) pulse with low speed, a pseudo-wedge wave (p-WW) pulse was found with a velocity higher than the velocity of shear bulk waves, propagating in the same direction. With a probe-beam-deflection technique, the propagation of the WW pulses was monitored on one of the faces of the wedge at variable distance from the apex. In this way, their depth structure and the leakage of the p-WW could be visualized directly. Calculations were carried out using a method based on a representation of the displacement field in Laguerre functions. This method has been validated by calculating the surface density of states in anisotropic media and comparing the results with those obtained from the surface Green's tensor. The approach has then been extended to the continuum of acoustic modes in infinite wedges with fixed wave-vector along the apex. These calculations confirmed the measured speeds of the WW and p-WW pulses.show moreshow less

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Metadaten
Document Type:Conference Proceeding
Conference Type:Konferenzartikel
Zitierlink: https://opus.hs-offenburg.de/8567
Bibliografische Angaben
Title (English):Leaky wedge acoustic waves in single-crystal silicon
Conference:IEEE International Ultrasonics Symposium (21-25 July 2013 : Prague, Czech Republic)
Author:Alexey M. LomonosovStaff MemberORCiDGND, Pavel Dmitrievich PupyrevStaff MemberORCiDGND, Peter Hess, Andreas MayerStaff MemberGND
Year of Publication:2014
Publisher:IEEE
First Page:1362
Last Page:1365
Parent Title (English):2013 IEEE International Ultrasonics Symposium (IUS)
ISBN:978-1-4673-5686-2 (Elektronisch)
ISBN:978-1-4673-5684-8 (CD)
ISSN:1051-0117 (Print)
DOI:https://doi.org/10.1109/ULTSYM.2013.0346
Language:English
Inhaltliche Informationen
Institutes:Fakultät Wirtschaft (W)
Institutes:Bibliografie
Formale Angaben
Open Access: Closed 
Licence (German):License LogoUrheberrechtlich geschützt