Femtosecond laser ablation of copper at high laser fluence: Modeling and experimental comparison

•Thermal ablation from a copper foil surface by a single femtosecond laser pulse was investigated theoretically and experimentally.•A 1D two-temperature model with temperature-dependent material properties was considered.•An average ablation depths difference between simulation and experimental resu...

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Bibliographic Details
Published in:Applied surface science 2016-01, Vol.361, p.41-48
Main Authors: Cheng, C.W., Wang, S.Y., Chang, K.P., Chen, J.K.
Format: Article
Language:English
Subjects:
Ablation
Computer simulation
Copper
Explosions
Femtosecond
Femtosecond laser
Fluence
Lasers
Phase change
Phase explosion model
Two-temperature model
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Summary:•Thermal ablation from a copper foil surface by a single femtosecond laser pulse was investigated theoretically and experimentally.•A 1D two-temperature model with temperature-dependent material properties was considered.•An average ablation depths difference between simulation and experimental results being only about 36nm. Thermal ablation of a copper foil surface by a single femtosecond laser pulse of duration 120fs and wavelength 800nm was investigated herein both theoretically and experimentally. A 1D two-temperature model with temperature-dependent material properties was considered, including the extended Drude model for dynamic optical properties. The rapid phase change and phase explosion models were incorporated to simulate the material ablation process. The simulated ablation depths agree well with the experimental measurements for the high laser fluence regime ranging from 6.1 to 63.4J/cm2.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2015.11.055