Suppresion of ablation in femtosecond double pulse laser experiments

Abstract : We report the physical reasons of a curious decrease in the crater depth observed for long delays in experiments with two successive femtosecond pulses. Detailed hydrodynamic modeling demonstrates that the ablation mechanism is dumped when the delay between the pulses exceeds the electron-ion relaxation time. In this case, the interaction of the second laser pulse with the expanding target material leads to the formation of the second shock wave suppressing the rarefaction wave created by the first pulse. The evidence of this effect follows from the pressure and density profiles obtained at different delays after the first laser pulse.
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Article dans une revue
Physical Review Letters, American Physical Society, 2009, 103, pp.195002
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https://hal-ujm.archives-ouvertes.fr/ujm-00431128
Contributeur : Tatiana Itina <>
Soumis le : mardi 10 novembre 2009 - 17:32:20
Dernière modification le : jeudi 11 janvier 2018 - 06:20:35

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  • HAL Id : ujm-00431128, version 1

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M. E. Povarnitsyn, Tatiana Itina, K. V. Khishchenko, P. Levashov. Suppresion of ablation in femtosecond double pulse laser experiments. Physical Review Letters, American Physical Society, 2009, 103, pp.195002. 〈ujm-00431128〉

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