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  • Received: May. 21, 2004

    Accepted: --

    Posted: Jun. 6, 2006

    Published Online: Jun. 6, 2006

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    Xuan Liu, Yang Wang. Femtosecond laser ablation of metals: a molecular dynamics simulation study[J]. Chinese Optics Letters, 2005, 3(1): 0157

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Chinese Optics Letters, Vol. 3, Issue 1, 0157 (2005)

Femtosecond laser ablation of metals: a molecular dynamics simulation study

Xuan Liu1,2and Yang Wang1,2

Author Affiliations

  • 1Department of Mechanical &
  • 2Automation, Harbin Institute of Technology, Harbin 150001

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.

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