Thermal regime of laser ablation of metals by ultrashort pulses of low fluences

Vladimir A. Isakov; Yuri V. Afanasiev; Boris N. Chichkov; Andrei P. Kanavin; Sergei A. Uryupin

doi:10.1117/12.376994

1 February 2000 Thermal regime of laser ablation of metals by ultrashort pulses of low fluences

Vladimir A. Isakov, Yuri V. Afanasiev, Boris N. Chichkov, Andrei P. Kanavin, Sergei A. Uryupin

Proceedings Volume 3885, High-Power Laser Ablation II; (2000) https://doi.org/10.1117/12.376994
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

Thermal ablation of a metal surface by low-energy ultrashort laser pulses is considered theoretically. The temporal dynamics of the surface electron and lattice temperatures is studied within the framework of the two-temperature model and for different temperature dependencies of the characteristics of the metal (electron-relaxation time, heat capacity, thermal conductivity). The approximation of evaporation into a vacuum is used to determine the ablation depth. Analytical expressions for the ablation-threshold fluence F_th as well as the threshold values of the lattice temperature T_th(F_th) and the characteristic time of lattice temperature decay t_d(F_th) are obtained. This analytical description is in satisfactory agreement with particular numerical calculations.

Citation Download Citation

Vladimir A. Isakov, Yuri V. Afanasiev, Boris N. Chichkov, Andrei P. Kanavin, and Sergei A. Uryupin "Thermal regime of laser ablation of metals by ultrashort pulses of low fluences", Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); https://doi.org/10.1117/12.376994

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