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Title: Modification of transparent materials with ultrashort laser pulses: What is energetically and mechanically meaningful?

A comprehensive analysis of laser-induced modification of bulk glass by single ultrashort laser pulses is presented which is based on combination of optical Maxwell-based modeling with thermoelastoplastic simulations of post-irradiation behavior of matter. A controversial question on free electron density generated inside bulk glass by ultrashort laser pulses in modification regimes is addressed on energy balance grounds. Spatiotemporal dynamics of laser beam propagation in fused silica have been elucidated for the regimes used for direct laser writing in bulk glass. 3D thermoelastoplastic modeling of material relocation dynamics under laser-induced stresses has been performed up to the microsecond timescale when all motions in the material decay. The final modification structure is found to be imprinted into material matrix already at sub-nanosecond timescale. Modeling results agree well with available experimental data on laser light transmission through the sample and the final modification structure.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [5]
  1. HiLASE Centre, Institute of Physics ASCR, Za Radnicí 828, 25241 Dolní Břežany (Czech Republic)
  2. (Russian Federation)
  3. Institute of Computational Technologies SB RAS, 6 Lavrentyev Ave., 630090 Novosibirsk (Russian Federation)
  4. Novosibirsk State University, 1 Koptuga Ave., 630090 Novosibirsk (Russian Federation)
  5. Design and Technology Branch of Lavrentyev Institute of Hydrodynamics SB RAS, Tereshkovoi street 29, 630090 Novosibirsk (Russian Federation)
Publication Date:
OSTI Identifier:
22493049
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 23; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BEAM TRANSPORT; ELECTRON DENSITY; ENERGY BALANCE; EXPERIMENTAL DATA; GLASS; LASERS; LIGHT TRANSMISSION; MATERIALS; MAXWELL EQUATIONS; MODIFICATIONS; PULSES; SILICA; SIMULATION; STRESSES; THREE-DIMENSIONAL CALCULATIONS