Ablation thresholds of metals with femtosecond laser pulses

Masaki Hashida; Alexandre F. Semerok; Olivier Gobert; Guillaume Petite; J.-F. Wagner

doi:10.1117/12.431220

26 June 2001 Ablation thresholds of metals with femtosecond laser pulses

Masaki Hashida, Alexandre F. Semerok, Olivier Gobert, Guillaume Petite, J.-F. Wagner

Proceedings Volume 4423, Nonresonant Laser-Matter Interaction (NLMI-10); (2001) https://doi.org/10.1117/12.431220
Event: Nonresonant Laser-Matter Interaction (NLMI-10), 2000, St. Petersburg, Russian Federation

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.

Citation Download Citation

Masaki Hashida, Alexandre F. Semerok, Olivier Gobert, Guillaume Petite, and J.-F. Wagner "Ablation thresholds of metals with femtosecond laser pulses", Proc. SPIE 4423, Nonresonant Laser-Matter Interaction (NLMI-10), (26 June 2001); https://doi.org/10.1117/12.431220

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