Ultrashort-pulse laser excitation and damage of dielectric materials: experiments and modeling

Lasse Haahr-Lillevang; Peter Balling

doi:10.1117/12.2185834

14 July 2015 Ultrashort-pulse laser excitation and damage of dielectric materials: experiments and modeling

Lasse Haahr-Lillevang, Peter Balling

Proceedings Volume 9532, Pacific Rim Laser Damage 2015: Optical Materials for High-Power Lasers; 953213 (2015) https://doi.org/10.1117/12.2185834
Event: Pacific Rim Laser Damage, 2015, Jiading, Shanghai, China

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.

Citation Download Citation

Lasse Haahr-Lillevang and 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); https://doi.org/10.1117/12.2185834

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