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Proceedings Paper

Picosecond-laser-pulse-induced heat and mass transfer
Author(s): Vadim Kostrykin; Markus Niessen; Juergen Jandeleit; Wolfgang Schulz; Ernst-Wolfgang Kreutz; Reinhart Poprawe
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Paper 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.

Paper Details

Date Published: 14 September 1998
PDF: 12 pages
Proc. SPIE 3343, High-Power Laser Ablation, (14 September 1998); doi: 10.1117/12.321533
Show Author Affiliations
Vadim Kostrykin, Rheinisch-Westfalische Technische Hochschule Aachen (Germany)
Markus Niessen, Rheinisch-Westfalische Technische Hochschule Aachen (Germany)
Juergen Jandeleit, Fraunhofer Institute fuer Lasertechnik (United States)
Wolfgang Schulz, Fraunhofer Institute fuer Lasertechnik (Germany)
Ernst-Wolfgang Kreutz, Technical Univ. Aachen (Germany)
Reinhart Poprawe, Rheinisch-Westfalische Technische Hochschule Aachen (Germany)

Published in SPIE Proceedings Vol. 3343:
High-Power Laser Ablation
Claude R. Phipps, Editor(s)

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