Ultrafast nonequilibrium stress generation in gold and silver
- 1 April 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 49 (14), 9985-9988
- https://doi.org/10.1103/physrevb.49.9985
Abstract
The dynamics of coherent phonon generation by femtosecond optical pulses in thin gold and silver films is studied using a pump and probe scheme. Detection is achieved by monitoring ultrafast surface vibrations in real time using laser-beam deflection. The phonon strain pulse shapes can be explained through the nonequilibrium coupling of the electron and phonon distributions, suggesting a new method for measuring the electron-phonon coupling constant.Keywords
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