A Combined Model and Its Verification for Femtosecond-Pulse Materials 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 milimeter and from femtosecond to microsecond through comprehensive, integrated multiscale physico-chemical 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 is 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. Copyright © 2008 by ASME.
L. Jiang and H. Tsai, "A Combined Model and Its Verification for Femtosecond-Pulse Materials Interactions," 2008 Proceedings of the ASME - 2nd International Conference on Integration and Commercialization of Micro and Nanosystems, MicroNano 2008, American Society of Mechanical Engineers (ASME), Jan 2008.
The definitive version is available at http://dx.doi.org/10.1115/MicroNano2008-70127
2008 ASME 2nd International Conference on Integration and Commercialization of Micro and Nanosystems, MicroNano 2008
Mechanical and Aerospace Engineering
Nanotechnology Institute, ASME
Chinese Mechanical Engineering Society, CMES
Micro- Nanotechnol. Commer. Educ. Found., MANCEF
Article - Conference proceedings
© 2008 American Society of Mechanical Engineers (ASME), All rights reserved.