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 |
|---|---|
| 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)
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Harata, A., Nishimura, H., & Sawada, T. (1990). Laser-induced surface acoustic waves and photothermal surface gratings generated by crossing two pulsed laser beams. Applied Physics Letters, 57(2), 132-134. https://doi.org/10.1063/1.103964