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Proceedings Paper

Laser ablation of fused silica induced by gold nanoparticles: comparison of simulations and experiments at lambda = 351 nm
Author(s): Herve Bercegol; Florian Bonneau; Philippe Bouchut; Patrick Combis; J. Donohue; Laurent Gallais; Laurent Lamaignere; Carol Le Diraison; Marc Loiseau; Jean-Yves Natoli; Catherine Pelle; Michela Perra; Jean-Luc Rullier; Jacques Vierne; Helene Ward
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Paper Abstract

Simulations of laser-fused silica interactions at 0.351 μm are a key issue in predicting and quantifying laser damage in large laser systems such as LIL and LMJ. Validation of numerical simulations requires detailed knowledge of the different parameters involved in the interaction. To concentrate on a simple situation, we have made and tested a thin film system based on calibrated gold nanoparticles (0.2-0.8 μm diameter) inserted between two silica layers. The fused silica overcoat was either 2 or 10 microns thick. We have performed simulations of laser energy deposition in the engineered defect (i.e. nanoparticle) and the surrounding fused silica taking into account various laser/defect induced absorption mechanisms of SiO2 (radiative ionization, avalanche and multiphotonic ionization). We have studied crater formation produced by the absorber explosion with a 2D Lagrange-Euler code taking into account crack formation and propagation in the brittle material. We discuss the influence of the defect depth (with respect to the surface) on the damage morphology. The simulations are compared with our experimental results.

Paper Details

Date Published: 13 September 2002
PDF: 12 pages
Proc. SPIE 4760, High-Power Laser Ablation IV, (13 September 2002); doi: 10.1117/12.482069
Show Author Affiliations
Herve Bercegol, CEA-CESTA (France)
Florian Bonneau, CEA-DIF (France)
Philippe Bouchut, CEA-LETI (France)
Patrick Combis, CEA-DIF (France)
J. Donohue, Ctr. d'Etudes Nucleaires de Bordeaux-Gradignan (France)
Laurent Gallais, Univ. de Saint-Jerome (France)
Laurent Lamaignere, CEA-DIF (France)
Carol Le Diraison, CEI-LETI (France)
Marc Loiseau, CEA-DIF (France)
Jean-Yves Natoli, Univ. de Saint-Jerome (France)
Catherine Pelle, CEA-LETI (France)
Michela Perra, Univ. de Saint-Jerome (France)
Jean-Luc Rullier, CEA/DIF (France)
Jacques Vierne, CEA/DIF (France)
Helene Ward, CEA/DIF (France)

Published in SPIE Proceedings Vol. 4760:
High-Power Laser Ablation IV
Claude R. Phipps, Editor(s)

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