Geometrical modeling of ultrashort pulse laser ablation with redeposition and analysis of the influence of spot size and shape

Putzer, M.; Rogério da Silva, G.; Michael, K.; Schröder, N.; Schudeleit, T.; Bambach, M.; Wegener, K.

doi:10.1016/j.matdes.2024.113357

Materials & Design

2024

DOI: 10.1016/j.matdes.2024.113357

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Geometrical modeling of ultrashort pulse laser ablation with redeposition and analysis of the influence of spot size and shape

M. Putzer,

G. Rogério da Silva,

K. Michael

et al.

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2024

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Thermoelastic Vibration of Nickel Film Irradiated by Femtosecond Laser: Molecular Dynamics Study

Zhao,

Gu,

Yang

et al. 2024

Coatings

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A detailed understanding of the physical essence of the interaction between a femtosecond laser and its target material remains an important and challenging goal. In this paper, the thermoelastic vibration behavior of nickel films irradiated by a femtosecond laser is studied by a molecular dynamics method combined with a two-temperature model. The model fully defines the spatial distribution of laser energy, the photoelectron coupling, and the electron-lattice coupling, and elucidates the temperature and stress evolution within the nickel film under femtosecond laser irradiation. Furthermore, the whole process and the mechanism of thermoelastic vibration is revealed at the atomic level. The thermoelastic vibration is divided into two stages, including continuous expansion during the process of energy relaxation and periodic expansion and contraction after reaching thermal equilibrium. The elastic oscillation of thin films is driven by periodic changes in energy, including the energy of atomic thermal motion and collective atomic motion. The effect of pulse fluence on thermoelastic vibration is also discussed in detail to provide reasonable suggestions for limiting this effect. This study provides the theoretical foundation and a feasible method for a deeper understanding of the interaction mechanisms between femtosecond lasers and materials.

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Thermoelastic Vibration of Nickel Film Irradiated by Femtosecond Laser: Molecular Dynamics Study

Zhao,

Gu,

Yang

et al. 2024

Coatings

View full text Add to dashboard Cite

show abstract

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Geometrical modeling of ultrashort pulse laser ablation with redeposition and analysis of the influence of spot size and shape

Cited by 1 publication

References 26 publications

Thermoelastic Vibration of Nickel Film Irradiated by Femtosecond Laser: Molecular Dynamics Study

Thermoelastic Vibration of Nickel Film Irradiated by Femtosecond Laser: Molecular Dynamics Study

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