Dynamics of Laser Desorption and Ablation of Metals at the Threshold on the Femtosecond Time Scale
- 16 October 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 85 (16) , 3516-3519
- https://doi.org/10.1103/physrevlett.85.3516
Abstract
The dynamics of the laser-ablation (-desorption) process of metals (Al, Ag, Fe, and Ni) initiated by 30 fs laser pulses has been investigated by interferometric time-resolved pump-probe measurements. It is postulated that a sufficiently high density of hot electrons is essential for achieving desorption of metal ions. In addition, we have observed a new and unexpected behavior characterized by delayed ablation for a pump-probe beam delay in the range of several ps for Al, Ni, and Fe. This second peak is attributed to the development of a liquid surface layer developing after a few ps. Molecular dynamics simulations support this assumption.Keywords
This publication has 19 references indexed in Scilit:
- Ultrafast electron dynamics in metals under laser irradiationPhysical Review B, 1999
- Ultrafast ablation with high-pulse-rate lasers. Part I: Theoretical considerationsJournal of Applied Physics, 1999
- Experimental investigations of laser ablation efficiency of pure metals with femto, pico and nanosecond pulsesApplied Surface Science, 1999
- Dependence of the phonon spectrum of a metal on electron temperature in a nonequilibrium electron-phonon systemJournal of Experimental and Theoretical Physics, 1999
- Femtosecond, picosecond and nanosecond laser ablation of solidsApplied Physics A, 1996
- Effect of image potential and charge exchange on the trajectory of fast protons in surface scatteringPhysical Review A, 1992
- Femtosecond time-resolved measurement of desorptionPhysical Review Letters, 1991
- Thermal Response of Metals to Ultrashort-Pulse Laser ExcitationPhysical Review Letters, 1988
- Ultrashort Surface-Plasmon and Phonon DynamicsPhysical Review Letters, 1988
- Femtosecond studies of nonequilibrium electronic processes in metalsPhysical Review Letters, 1987