High-power and ultrashort laser pulse ablation of metals: threshold characteristics

I. N. Zavestovskaya; O. A. Glazov; N. A. Menkova

doi:10.1117/12.753311

25 July 2007 High-power and ultrashort laser pulse ablation of metals: threshold characteristics

I. N. Zavestovskaya, O. A. Glazov, N. A. Menkova

Proceedings Volume 6735, International Conference on Lasers, Applications, and Technologies 2007: High-Power Lasers and Applications; 673512 (2007) https://doi.org/10.1117/12.753311
Event: International Conference on Lasers, Applications, and Technologies '07, 2007, Minsk, Belarus

Abstract

The results of theoretical studies are reported for threshold characteristics of a metal ablation by ultrashort laser pulses. Two possible mechanisms of the laser ablation at laser fluence F≥F_th are considered: thermal mechanism of ablation connected with a kinetics of a metal-vacuum surface evaporation and mechanism of ablation connected with a hydrodynamics of a dense matter. The analysis has been made within the framework of a two-temperature model of metals for two region of laser pulse duration-femtosecond and picosecond, and the extended of a two-temperature model of the metal. Analytical expressions for the ablation-threshold fluency F_th as well as the threshold values of the lattice time temperature T_th(F_th) are obtained.

Citation Download Citation

I. N. Zavestovskaya, O. A. Glazov, and N. A. Menkova "High-power and ultrashort laser pulse ablation of metals: threshold characteristics", Proc. SPIE 6735, International Conference on Lasers, Applications, and Technologies 2007: High-Power Lasers and Applications, 673512 (25 July 2007); https://doi.org/10.1117/12.753311

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