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Proceedings Paper

Ablation thresholds of metals with femtosecond laser pulses
Author(s): Masaki Hashida; Alexandre F. Semerok; Olivier Gobert; Guillaume Petite; J.-F. Wagner
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Paper Abstract

The laser ablation threshold experiments were performed on pure metals with the fs Gaussian laser beam focused to 41.5 mm spot diameter onto metal surfaces. Three different ablation thresholds were distinguished. The multi-shot ablation threshold for Cu with 70 fs pulse was found to be 0.018 J/cm2 and of one order to magnitude lower than that one observed previously. In the fluence range of 0.018- 0.2 J/cm2 the ablation rate was approximately equal to 0.01 nm/pulse. The threshold dependence on the pulse duration was demonstrated in the range of 70 fs-5 ps for Cu. As the laser pulse width increased, the ablation threshold had the tendency to be higher. The ablation rate dependence on laser fluence for the other metals under study in our experiments with 70 fs was similar to that of CU.

Paper Details

Date Published: 26 June 2001
PDF: 8 pages
Proc. SPIE 4423, Nonresonant Laser-Matter Interaction (NLMI-10), (26 June 2001); doi: 10.1117/12.431220
Show Author Affiliations
Masaki Hashida, CEA Saclay (France)
Alexandre F. Semerok, CEA Saclay (France)
Olivier Gobert, CEA Saclay (France)
Guillaume Petite, Ecole Polytechnique (France)
J.-F. Wagner, CEA Saclay (France)


Published in SPIE Proceedings Vol. 4423:
Nonresonant Laser-Matter Interaction (NLMI-10)
Mikhail N. Libenson, Editor(s)

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