Abstract
A theoretical formalism describing the heterodyne detection of plane inhomogeneous shear acoustic waves by probe laser-induced gratings is developed. An inhomogeneous plane shear acoustic wave is a purely shear wave with a plane phase front and mechanical displacement vector, which is sinusoidally spatially modulated in magnitude. It could be generated by laser-induced gratings and could be useful for the acoustic testing of sub-micrometer thick membranes and coatings in the gigahertz frequency range. The theory reveals the potential advantages and disadvantages of this wave application in non-destructive testing of materials and fundamental research from the point of view of the feasibility of their experimental detection.
© 2016 Optical Society of America
Full Article | PDF ArticleMore Like This
Denis Mounier, Pascal Picart, Philippe Babilotte, Pascal Ruello, Jean-Marc Breteau, Thomas Pézeril, Gwenaëlle Vaudel, Mansour Kouyaté, and Vitalyi Gusev
Opt. Express 18(7) 6767-6778 (2010)
Taiki Saito, Osamu Matsuda, Motonobu Tomoda, and Oliver B. Wright
J. Opt. Soc. Am. B 27(12) 2632-2638 (2010)
A. V. Scherbakov, M. Bombeck, J. V. Jäger, A. S. Salasyuk, T. L. Linnik, V. E. Gusev, D. R. Yakovlev, A. V. Akimov, and M. Bayer
Opt. Express 21(14) 16473-16485 (2013)