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Proceedings Paper

Dynamics of femtosecond-laser-induced ablation from solid surfaces
Author(s): Klaus Sokolowski-Tinten; Joerg Bialkowski; Andrea Cavalleri; Martin Boing; Harald Schueler; Dietrich von der Linde
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Paper Abstract

Femtosecond laser induced ablation from solid surfaces has been investigated by means of time resolved microscopy. On transparent materials ablation is initiated by dielectric breakdown and formation of a dense and hot surface plasma. Measurements of the plasma threshold yield values of a few times 1013 W/cm2 with little variation among different materials. This indicates that microscopic surface properties are responsible for surface breakdown. On absorbing semiconductors and metals near-threshold ablation is brought about by hydrodynamic expansion of the laser generated hot and pressurized matter. Upon expansion into vacuum initially metallic materials transform into a transparent state with a high refractive index. The observed behavior is related to general properties of matter in the liquid-gas coexistence regime.

Paper Details

Date Published: 14 September 1998
PDF: 12 pages
Proc. SPIE 3343, High-Power Laser Ablation, (14 September 1998); doi: 10.1117/12.321593
Show Author Affiliations
Klaus Sokolowski-Tinten, Univ.-Gesamthochschule Essen (Germany)
Joerg Bialkowski, Univ.-Gesamthochschule Essen (Germany)
Andrea Cavalleri, Univ.-Gesamthochschule Essen and Univ. degli Studi di Pavia (United States)
Martin Boing, Univ.-Gesamthochschule Essen (Germany)
Harald Schueler, Univ.-Gesamthochschule Essen (Germany)
Dietrich von der Linde, Univ.-Gesamthochschule Essen (Germany)

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

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