title: Beam distortion detection and deflectometry measurements of gigahertz surface acoustic waves.
abstract: 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.
authors: Département d'Acoustique Physique, Université de Bordeaux, CNRS, UMR 5295, I2M, Talence F-33405, France.
authors: Julien
authors: J
authors: Higuet
authors: Tony
authors: T
authors: Valier-Brasier
authors: Thomas
authors: T
authors: Dehoux
authors: Bertrand
authors: B
authors: Audoin