Thermo-elasto-plastic simulations of femtosecond laser-induced multiple-cavity in fused silica

R. Beuton (1) , B Chimier , J Breil , D Hébert , K Mishchik , J Lopez , P H Maire , G Duchateau

1 CELIA - Centre d'Etudes Lasers Intenses et Applications

The formation and the interaction of multiple cavities, induced by tightly focused femtosecond laser pulses, are studied using a developed numerical tool, including the thermo-elasto-plastic material response. Simulations are performed in fused silica in cases of one, two, and four spots of laser energy deposition. The relaxation of the heated matter, launching shock waves in the surrounding cold material, leads to cavity formation and emergence of areas where cracks may be induced. Results show that the laser-induced structure shape depends on the energy deposition configuration and demonstrate the potential of the used numerical tool to obtain the desired designed structure or technological process.

Domaines: Physique [physics]; Optique [physics.optics]; Physique des plasmas [physics.plasm-ph]

R. Beuton, B Chimier, J Breil, D Hébert, K Mishchik, et al.. Thermo-elasto-plastic simulations of femtosecond laser-induced multiple-cavity in fused silica. Applied Physics A Solids and Surface, 2018, 124, ⟨10.1007/s00339-018-1743-x⟩. ⟨hal-02329613⟩