Applied Physics A

, Volume 57, Issue 5, pp 449–455 | Cite as

The role of excited species in UV-laser materials ablation

Part II. The stability of the ablation front
  • B. Luk'yanchuk
  • N. Bityurin
  • S. Anisimov
  • D. Bäuerle
Surfaces And Multilayers


The stability of a planar surface upon pulsed UV-laser irradiation is studied with special emphasis on polymer ablation. Here, we consider a two-level system in which the excitation energy is dissipated via stimulated emission, non-radiative transitions, and activated desorption of excited species. With thermal relaxation times tT≥10−10 s the ablation front turns out to become stable. This could explain the smooth surfaces obtained after pulsed UV-laser ablation of pure and stress free organic polymers. The situation is quite different for materials, for example metals, where fast thermal relaxation of the excitation energy within times, typically, tT<10−11 s, gives rise to instabilities which result in surface roughening.


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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • B. Luk'yanchuk
    • 1
  • N. Bityurin
    • 1
  • S. Anisimov
    • 1
  • D. Bäuerle
    • 1
  1. 1.Angewandte PhysikJohannes-Kepler-Universität LinzLinzAustria

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