14 July 2015 Ultrashort-pulse laser excitation and damage of dielectric materials: experiments and modeling
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Abstract
Ultrashort-pulse laser excitation of dielectrics is an intricate problem due to the strong coupling between the rapidly changing material properties and the light. In the present paper, details of a model based on a multiple-rate-equation description of the conduction band are provided. The model is verified by comparison with recent experimental measurements of the transient optical properties in combination with ablation-depth determinations. The excitation process from the first creation of conduction-band electrons at low intensities to the formation of a highly-excited plasma and associated material fragmentation is explained by the model. For quartz samples, the optical properties are strongly influenced by self-trapped excitons, and the associated additions to the model are described.
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Lasse Haahr-Lillevang, Lasse Haahr-Lillevang, Peter Balling, Peter Balling, } "Ultrashort-pulse laser excitation and damage of dielectric materials: experiments and modeling", Proc. SPIE 9532, Pacific Rim Laser Damage 2015: Optical Materials for High-Power Lasers, 953213 (14 July 2015); doi: 10.1117/12.2185834; https://doi.org/10.1117/12.2185834
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