Dynamic imaging of surface acoustic waves in phononic crystals

Oliver B. Wright; István A. Veres; Dieter M. Profunser; Osamu Matsuda; Brian Culshaw; Udo Lang

doi:10.1117/12.905005

23 December 2011 Dynamic imaging of surface acoustic waves in phononic crystals

Oliver B. Wright, István A. Veres, Dieter M. Profunser, Osamu Matsuda, Brian Culshaw, Udo Lang

Proceedings Volume 8204, Smart Nano-Micro Materials and Devices; 820425 (2011) https://doi.org/10.1117/12.905005
Event: SPIE Smart Nano + Micro Materials and Devices, 2011, Melbourne, Australia

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.

Citation Download Citation

Oliver B. Wright, István A. Veres, Dieter M. Profunser, Osamu Matsuda, Brian Culshaw, and Udo Lang "Dynamic imaging of surface acoustic waves in phononic crystals", Proc. SPIE 8204, Smart Nano-Micro Materials and Devices, 820425 (23 December 2011); https://doi.org/10.1117/12.905005

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