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18 December 2024 Ultrafast laser-irradiated silica: from excited-state dynamics to nanostructuring
Jean-Philippe Colombier, Arshak Tsaturyan, Aram Melkonyan, Elena Kachan, Anton Rudenko, Razvan Stoian
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Proceedings Volume PC13190, Laser-Induced Damage in Optical Materials 2024; PC1319005 (2024) https://doi.org/10.1117/12.3031833
Event: SPIE Laser Damage, 2024, San Ramon, CA, United States
Abstract
Understanding the response of wide-bandgap materials such as silicon dioxide (fused silica, α-quartz) to light is crucial for achieving precise control and manipulation in ultrafast laser volume structuring at the nanoscale. Surpassing optical resolution, this scale of achievement necessitates manipulating light energy around bulk inhomogeneities while precisely orchestrating selective thermodynamic pathways for absorption confinement, crystal-amorphous transformation and rapid energy quenching within nanometer lengths. We propose multiphysics calculations to elucidate the intricate interplay between electronic structure alterations and structural/hydrodynamical relaxation mechanisms under extreme nonequilibrium conditions. In particular, ab initio calculations reveal a narrowing of the bandgap by several eV and a loss of cohesion within an ultrashort timescale. This approach enables precise control and manipulation, optimizing processing parameters, and exploring novel aspects of solid relaxation induced by intense photoexcitation.
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Jean-Philippe Colombier, Arshak Tsaturyan, Aram Melkonyan, Elena Kachan, Anton Rudenko, and Razvan Stoian "Ultrafast laser-irradiated silica: from excited-state dynamics to nanostructuring", Proc. SPIE PC13190, Laser-Induced Damage in Optical Materials 2024, PC1319005 (18 December 2024); https://doi.org/10.1117/12.3031833
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KEYWORDS
Silica
Ultrafast phenomena
Laser irradiation
Laser nanostructuring
Laser processing
Crystals
Solids
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