Abstract
To describe the effect of significant enhancement in thermal energy retained in metal targets following femtosecond laser ablation in a gas environment, we develop a combined model based on both 2D thermal modeling of laser-induced target heating and dynamics of the ambient gas perturbed by multiphoton absorption of laser energy in close proximity to the target. Using our model, we find that thermal energy coupling to the sample is significantly enhanced due to laser-induced gas-dynamic motion in plasma. Another finding is that total thermal energy coupled to the sample due to gas-dynamic energy transfer and thermal energy conduction is close to that measured in our experiment.
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Bulgakova, N.M., Zhukov, V.P., Vorobyev, A.Y. et al. Modeling of residual thermal effect in femtosecond laser ablation of metals: role of a gas environment. Appl. Phys. A 92, 883–889 (2008). https://doi.org/10.1007/s00339-008-4568-1
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DOI: https://doi.org/10.1007/s00339-008-4568-1