Ablation dynamics of solids heated by femtosecond laser pulses

Baerbel Rethfeld; Klaus Sokolowski-Tinten; V. V. Temnov; Sergei I. Kudryashov; Joerg Bialkowski; Andrea Cavalleri; Dietrich von der Linde

doi:10.1117/12.431221

26 June 2001 Ablation dynamics of solids heated by femtosecond laser pulses

Baerbel Rethfeld, Klaus Sokolowski-Tinten, V. V. Temnov, Sergei I. Kudryashov, Joerg Bialkowski, Andrea Cavalleri, Dietrich von der Linde

Author Affiliations +

Proceedings Volume 4423, Nonresonant Laser-Matter Interaction (NLMI-10); (2001) https://doi.org/10.1117/12.431221
Event: Nonresonant Laser-Matter Interaction (NLMI-10), 2000, St. Petersburg, Russian Federation

Abstract

Ultrafast time resolved microscopy of femtosecond laser irradiated surfaces reveals a universal feature of the ablating surface on nanosecond time scale. All investigated materials show rings in the ablation zone, which were identified as an interference pattern. Optically sharp surface occur during expansion of the heated material as a result of anomalous hydrodynamic expansion effects. Experimentally, the rings are observed within a certain fluence range which strongly depends on material parameters. The lower limit of this fluence range is the ablation threshold. We predict a fluence ratio between the upper and the lower fluence limit approximately equal to the ratio of critical temperature to boiling temperature at normal pressure. This estimate is experimentally confirmed on different materials.

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Baerbel Rethfeld, Klaus Sokolowski-Tinten, V. V. Temnov, Sergei I. Kudryashov, Joerg Bialkowski, Andrea Cavalleri, and Dietrich von der Linde "Ablation dynamics of solids heated by femtosecond laser pulses", Proc. SPIE 4423, Nonresonant Laser-Matter Interaction (NLMI-10), (26 June 2001); https://doi.org/10.1117/12.431221

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