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Spatiotemporal mapping of surface acoustic waves in isotropic and anisotropic materials

โœ Scribed by Y. Sugawara; O.B. Wright; O. Matsuda; V.E. Gusev

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
542 KB
Volume
40
Category
Article
ISSN
0041-624X

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โœฆ Synopsis

We demonstrate a new method for a real-time imaging of surface acoustic waves at frequencies up to 1 GHz with picosecond temporal and micron spatial resolutions using an ultrafast optical pump and probe technique combined with a common path interferometer. Using samples with isotropic or anisotropic substrates coated with metallic thin films, we observe the propagation of Rayleigh-like modes and surface-skimming bulk modes as well as resolving surface phonon focusing effects. In addition we image surface acoustic wave propagation in a laterally inhomogeneous sample.

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