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Proceedings Article

Ablation dynamics of solids heated by femtosecond laser pulses

[+] Author Affiliations
Baerbel Rethfeld, Klaus Sokolowski-Tinten, Joerg Bialkowski, Dietrich von der Linde

Univ. Essen (Germany)

V. V. Temnov

Univ. Essen and Institute of Applied Physics (Russia)

Sergei I. Kudryashov

Univ. Essen and M.V. Lomonosov Moscow State Univ. (USA)

Andrea Cavalleri

Univ. of California/San Diego (USA)

Proc. SPIE 4423, Nonresonant Laser-Matter Interaction (NLMI-10), 186 (June 26, 2001); doi:10.1117/12.431221
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From Conference Volume 4423

  • Nonresonant Laser-Matter Interaction (NLMI-10)
  • Mikhail N. Libenson
  • St. Petersburg, Russia | August 21, 2000

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.

© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Baerbel Rethfeld ; Klaus Sokolowski-Tinten ; V. V. Temnov ; Sergei I. Kudryashov ; Joerg Bialkowski, et al.
"Ablation dynamics of solids heated by femtosecond laser pulses", Proc. SPIE 4423, Nonresonant Laser-Matter Interaction (NLMI-10), 186 (June 26, 2001); doi:10.1117/12.431221; http://dx.doi.org/10.1117/12.431221


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