Abstract
Gigahertz surface acoustic waves have been optically generated and detected on aluminum metallic films and silicon wafers using the laser-induced grating technique. The acoustic velocities were in good agreement with those of Rayleigh waves. Photothermal surface gratings could also be detected as a nonpropagating component of the thermoelastic waves. The relaxation time of the grating was related to the thermal diffusivity of the material. A simplified theory for the generation of surface transient gratings containing acoustic waves is presented in addition to the experimental results.
Original language | English |
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Pages (from-to) | 132-134 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 57 |
Issue number | 2 |
DOIs | |
Publication status | Published - Dec 1 1990 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)