Picosecond-laser-pulse-induced heat and mass transfer

Vadim Kostrykin; Markus Niessen; Juergen Jandeleit; Wolfgang Schulz; Ernst-Wolfgang Kreutz; Reinhart Poprawe

doi:10.1117/12.321533

14 September 1998 Picosecond-laser-pulse-induced heat and mass transfer

Vadim Kostrykin, Markus Niessen, Juergen Jandeleit, Wolfgang Schulz, Ernst-Wolfgang Kreutz, Reinhart Poprawe

Proceedings Volume 3343, High-Power Laser Ablation; (1998) https://doi.org/10.1117/12.321533
Event: High-Power Laser Ablation, 1998, Santa Fe, NM, United States

Abstract

The interaction of picosecond and sub-picosecond laser pulses with metals is investigated both, theoretically and experimentally. Analyzing the Boltzmann equation for electrons and phonons the hyperbolic two-temperature model of heat conduction in metals is obtained. In particular the parameter range for which the hyperbolic effects are significant is analyzed. For calculations a numerical algorithm based on the method of lines is developed. Experimentally laser pulses with a duration of 40 ps are used to remove thin metal films. The removal process is analyzed by pump and probe measurements with the time resolution of 40 ps. The single-shot removal threshold and the removal rate per pulse are determined for copper. By this technique the existence and the propagation of shock waves in the ambient atmosphere induced by the removal process are detected. Theoretical calculations are compared with experiments and the results from the literature.

Citation Download Citation

Vadim Kostrykin, Markus Niessen, Juergen Jandeleit, Wolfgang Schulz, Ernst-Wolfgang Kreutz, and Reinhart Poprawe "Picosecond-laser-pulse-induced heat and mass transfer", Proc. SPIE 3343, High-Power Laser Ablation, (14 September 1998); https://doi.org/10.1117/12.321533

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