Abstract : We perform a hydrodynamic simulation of laser ablation of metals to explain the results of recent experiments with subpicosecond double pulses (2 2 J/cm2). In the experiments, the time delay del between the pulses varies from 0.1 ps to 200 ps. When the delay is much shorter than the electron-ion relaxation time ei (delay << ei) the crater depth is the same as for a single pulse of energy 4 J/cm2. For the intermediate delays (delay ~ ei) the crater depth monotonically drops. For the long delay delay >> ei the crater depth corresponds to that obtained with a single pulse. The results of the hydrodynamic two-temperature simulations performed with realistic absorption and multiphase equation of state explain the observed behavior.
https://hal-ujm.archives-ouvertes.fr/ujm-00472026
Contributeur : Tatiana Itina
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Soumis le : vendredi 9 avril 2010 - 12:00:00
Dernière modification le : jeudi 18 janvier 2018 - 01:28:10
M. E. Povarnitsyn, K. V. Khishchenko, Pavel Levashov, A. Zakharenkov, Jörg Hermann, et al.. Simulation of ultrashort double pulse laser ablation of metals. Journal of Optoelectronics and Advanced Materials, 2010, 12 (3), pp.674-676. 〈ujm-00472026〉
