Heat transport in metals irradiated by ultrashort laser pulses

Andrei P. Kanavin; Yuri V. Afanasiev; Boris N. Chichkov; Vladimir A. Isakov; Igor V. Smetanin

doi:10.1117/12.376993

1 February 2000 Heat transport in metals irradiated by ultrashort laser pulses

Andrei P. Kanavin, Yuri V. Afanasiev, Boris N. Chichkov, Vladimir A. Isakov, Igor V. Smetanin

Proceedings Volume 3885, High-Power Laser Ablation II; (2000) https://doi.org/10.1117/12.376993
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

Different regimes of heat propagation in metals irradiated by subpicosecond laser pulses are studied on the basis of two-temperature diffusion model. New analytical solutions for the heat conduction equation, corresponding to the different temperature dependences of the electron thermal conductivity (formula available n paper), are found. It is shown that in case of a strong electron-lattice nonequilibrium, the heat penetration depth grows linearly with time, l_T varies direct as t, in opposite to the ordinary diffusionlike behavior, l_T varies direct as t^1/2. Moreover, the heat propagation velocity decreases with increasing laser fluence.

Citation Download Citation

Andrei P. Kanavin, Yuri V. Afanasiev, Boris N. Chichkov, Vladimir A. Isakov, and Igor V. Smetanin "Heat transport in metals irradiated by ultrashort laser pulses", Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); https://doi.org/10.1117/12.376993

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