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Université Jean Monnet – Saint-Etienne |  |
Journal articles
Numerical study of ultra-short laser ablation of metals and of laser plume dynamics
Abstract : Numerical modeling is used to investigate the physical mechanisms of the interaction of ultra-short (subpicosecond) laser pulses with metallic targets. The laser-target interaction is modeled by using a one-dimensional hydrodynamic code that includes the absorption of laser radiation, the electronic heat conduction, the electron-phonon or electron-ion energy exchange, as well as a realistic equation of state. Laser fluences typical for micromachining are considered. The results of the ID modeling are then used as the initial conditions for a 2D plasma expansion model. The dynamics of laser plume expansion in femtosecond regime is investigated. Calculations show that the plasma plume is strongly forward directed. In addition, a two-peaked axial density profile is obtained for 400 nm laser wavelength. The calculation results agree with the experimental observations.
https://hal-ujm.archives-ouvertes.fr/ujm-00377599
Contributor : Tatiana Itina Connect in order to contact the contributor
Submitted on : Wednesday, April 22, 2009 - 2:38:35 PM
Last modification on : Tuesday, October 19, 2021 - 11:00:06 PM
Contributor : Tatiana Itina Connect in order to contact the contributor
Submitted on : Wednesday, April 22, 2009 - 2:38:35 PM
Last modification on : Tuesday, October 19, 2021 - 11:00:06 PM