Beam distortion detection and deflectometry measurements of gigahertz surface acoustic waves

Gigahertz acoustic waves propagating on the surface of a metal halfspace are detected using different all-optical detection schemes, namely, deflectometry and beam distortion detection techniques. Both techniques are implemented by slightly modifying a conventional reflectometric setup. They are the...

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Bibliographic Details
Published inReview of scientific instruments Vol. 82; no. 11; p. 114905
Main Authors Higuet, Julien, Valier-Brasier, Tony, Dehoux, Thomas, Audoin, Bertrand
Format Journal Article
LanguageEnglish
Published United States 01.11.2011
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Summary:Gigahertz acoustic waves propagating on the surface of a metal halfspace are detected using different all-optical detection schemes, namely, deflectometry and beam distortion detection techniques. Both techniques are implemented by slightly modifying a conventional reflectometric setup. They are then based on the measurement of the reflectivity change but unlike reflectometric measurements, they give access to the sample surface displacement. A semi-analytical model, taking into account optical, thermal, and mechanical processes responsible for acoustic waves generation, allows analyzing the physical content of the detected waveforms.
ISSN:1089-7623
DOI:10.1063/1.3660193