Femtosecond laser ablation of metals: a molecular dynamics simulation study
Chinese Optics Letters, Vol. 3, Issue 1, pp. 57-59 (2005)
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Abstract
Using molecular dynamics (MD) methods combining with two-step radiation heating model, the mechanisms of ablation and the thermodynamic states at Ni surface under femtosecond laser irradiation are investigated. Simulation results show that the main mechanisms of ablation are evaporation and tensile stresses generated inside the target. The velocity of stress wave is predicted to be nearly equal to sound velocity. The rates of ablation at different fluences obtained from simulations are in good agreement with experimental data. Superheating phenomenon is also discovered.
© 2005 Chinese Optics Letters
OCIS Codes
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(140.7090) Lasers and laser optics : Ultrafast lasers
(310.3840) Thin films : Materials and process characterization
Citation
Xuan Liu and Yang Wang, "Femtosecond laser ablation of metals: a molecular dynamics simulation study," Chin. Opt. Lett. 3, 57-59 (2005)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-3-1-57
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