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Proceedings Paper

Laser generation of Stoneley waves at liquid-solid boundaries
Author(s): Barry Ward; David C. Emmony
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Paper Abstract

High-power laser radiation has long been used as a source of plasma-generated bulk and surface waves in solids. Of particular interest in this field are Stoneley waves which propagate at the plane boundary between two semi-infinite condensed media. In this work, the near-infrared radiation from a 1O-mJ Q-switched Nd:YAG laser is focused at water-metal, water-PMMA and water-glass interfaces. Ultra-high-speed dye-laser photography is used to visualise the propagation and attenuation of Stoneley and bulk-compression waves in the transparent media using Mach-Zehnder interferometry and focused shadowgraphy. It is believed that these results represent the first direct observation of Stoneley waves. By using Abel-inversion techniques, the pressure amplitudes in the two media are found as functions of both space and time. This leads to an understanding of the energy-dissipation processes which take place as the waves propagate outwards.

Paper Details

Date Published: 1 April 1991
PDF: 9 pages
Proc. SPIE 1358, 19th Intl Congress on High-Speed Photography and Photonics, (1 April 1991); doi: 10.1117/12.23974
Show Author Affiliations
Barry Ward, Univ. of Technology (United Kingdom)
David C. Emmony, Univ. of Technology (United Kingdom)

Published in SPIE Proceedings Vol. 1358:
19th Intl Congress on High-Speed Photography and Photonics
Peter W. W. Fuller, Editor(s)

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