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Applied Physics A

, Volume 70, Issue 6, pp 633–635 | Cite as

Ablation of dielectric materials during laser irradiation involving strong vibrational coupling

  • D.R. Ermer
  • M.R. Papantonakis
  • M. Baltz-Knorr
  • D. Nakazawa
  • R.F. Haglund Jr.

Abstract.

Photon energy can be deposited efficiently into an exceedingly small volume by using a laser tuned to a vibrational resonance of the material. Both calcite and silica have absorption depths of a few tenths micron at the asymmetric carbonate stretch (7.1 μm) and the Si-O stretch (9.6 μm), respectively. With the pulse energy available from a tunable mid-infrared free-electron laser, the small absorption volume is rapidly superheated. The result is a very clean ablation crater with little or no evidence of melted material or other debris at the rim or outside of the ablation crater. We propose that this clean, fracture-free, highly efficient ablation of dielectric materials is the result of the rapid heating of the absorption volume, in which the heat is confined by the low thermal conductivity of the material, to a critical temperature Tc where explosive homogenous nucleation occurs.

Keywords

Calcite Explosive Critical Temperature Pulse Energy Absorption Volume 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2000

Authors and Affiliations

  • D.R. Ermer
    • 1
  • M.R. Papantonakis
    • 1
  • M. Baltz-Knorr
    • 1
  • D. Nakazawa
    • 1
  • R.F. Haglund Jr.
    • 1
  1. 1.Department of Physics & Astronomy, and W.M. Keck Foundation Free-Electron Laser Center, Vanderbilt University, Nashville, Tennessee 37235, USAUS

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