Modeling of residual thermal effect in femtosecond laser ablation of metals: role of a gas environment |
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Authors: | N M Bulgakova V P Zhukov A Y Vorobyev Chunlei Guo |
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Institution: | (1) Institute of Thermophysics SB RAS, 1 Lavrentyev Ave., 630090 Novosibirsk, Russia;(2) Institute of Computational Technologies SB RAS, 6 Lavrentyev Ave., 630090 Novosibirsk, Russia;(3) The Institute of Optics, University of Rochester, Rochester, NY 14627, USA |
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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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Keywords: | PACS" target="_blank">PACS 79 20 Ds 52 25 Jm 47 40 -x |
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