Multiscale Modeling of Ultrafast Laser-Material Interactions
This paper reports the overall picture of our ongoing efforts to establish the scientific understanding of ultrafast, non-equilibrium laser-material interactions from nanometer to millimeter and from femtosecond to microsecond through comprehensive, integrated multiscale physicochemical modeling and experimental verification. A novel plasma model with quantum treatments is developed to account for significantly varying optical properties. The model is used to successfully predict two uncommon phenomena that are experimentally observed: 1) a flat-bottom crater shape created by a Gaussian beam and 2) repeatable nanoscale structures achieved by pulse train technology. The well known two-temperature model is improved by considering the quantum effects of different heat carriers and then is used to accurately predict the damage thresholds for metals. Preliminary results for these ongoing modeling efforts are reported in this article.
H. Tsai and L. Jiang, "Multiscale Modeling of Ultrafast Laser-Material Interactions," 3rd Pacific International Conference on Applications of Lasers and Optics, PICALO 2008 - Conference Proceedings, Laser Institute of America, Jan 2008.
3rd Pacific International Conference on Applications of Lasers and Optics, PICALO 2008
Mechanical and Aerospace Engineering
Article - Conference proceedings
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