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Proceedings Paper

Dynamic imaging of surface acoustic waves in phononic crystals
Author(s): Oliver B. Wright; István A. Veres; Dieter M. Profunser; Osamu Matsuda; Brian Culshaw; Udo Lang
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Paper Abstract

Using ultrashort pulsed optical excitation and interferometric detection, we image ultrahigh- frequency surface acoustic waves on two-dimensional (2D) phononic crystals in the time domain. The samples consist of a square lattice of airfilled holes etched in a silicon substrate. Good agreement with time-domain finite element numerical simulations is obtained. The dispersion relation is derived and stop bands are revealed by means of Fourier transforms. The wave fields corresponding to acoustic eigenmodes at specific frequencies are also presented.

Paper Details

Date Published: 23 December 2011
PDF: 6 pages
Proc. SPIE 8204, Smart Nano-Micro Materials and Devices, 820425 (23 December 2011); doi: 10.1117/12.905005
Show Author Affiliations
Oliver B. Wright, Hokkaido Univ. (Japan)
István A. Veres, Research Ctr. for Nondestructive Testing (Austria)
Dieter M. Profunser, Hokkaido Univ. (Japan)
Osamu Matsuda, Hokkaido Univ. (Japan)
Brian Culshaw, Univ. of Strathclyde (United Kingdom)
Udo Lang, ETH Zürich (Switzerland)

Published in SPIE Proceedings Vol. 8204:
Smart Nano-Micro Materials and Devices
Saulius Juodkazis; Min Gu, Editor(s)

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