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- W2003255071 abstract "In this study, the ablation of aluminum by a near-infrared femtosecond laser pulse (800 nm, 100 fs) at different intensity is investigated by a two-dimensional hydrodynamic model. The ablation rates are compared between the cases in vacuum and in air over a wide range of laser power density. It has been reported before that at low (<1013 W/cm2) and moderate laser intensity (1013–1014 W/cm2), two different ablation regimes exist, and the ablation depth per pulse is dependent on the optical penetration depth and electron heat penetration depth, respectively. By considering both collisional and collisionless absorptions, the model in this study predicts the third ablation regime with a much higher ablation rate increase with respect to laser intensity in the high intensity range (>1014 W/cm2) in vacuum, which shows good agreement with the experimental data. This phenomenon is attributed to the change of dominant absorption mechanism from collisional to collisionless absorption. For the case in air, the ablation depth increases slowly with the laser intensity in the high intensity regime, and is much smaller than that in vacuum. It is revealed that this is due to the strong early plasma-laser interaction in air." @default.
- W2003255071 created "2016-06-24" @default.
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- W2003255071 date "2013-10-01" @default.
- W2003255071 modified "2023-10-16" @default.
- W2003255071 title "Femtosecond laser ablation of aluminum in vacuum and air at high laser intensity" @default.
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- W2003255071 doi "https://doi.org/10.1016/j.apsusc.2013.06.037" @default.
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