Abstract
We consider the laser absorption mechanisms, the energy dissipation processes, and the consequences for the target material after pulsed irradiation of—mainly—solid targets. The strong dependence on laser pulse duration is emphasized. Both, the classical thermodynamic equilibrium route (heating, melting, and evaporation) and hyperthermal processes beyond thermodynamic equilibrium (superheating, phase explosion, surface/bulk instability) are comprehensively discussed, under particular consideration of relevant time scales. The implication of different processes for laser ablation and material structuring is addressed.
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Notes
- 1.
For simplicity, we assume a rectangular absorption volume, neglecting the details of the spatial beam profile and the exponential intensity decay according to Beer’s law.
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Acknowledgments
The author gratefully acknowledges fruitful collaboration with Markus Ratzke, Tzanimir Arguirov, Michael Bestehorn, Sergej Varlamov, and, particularly, Olga Varlamova, which was essential for the preparation of this manuscript.
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Reif, J. (2014). Material Response to Laser Energy Deposition (Thermal and Hyperthermal Processes). In: Castillejo, M., Ossi, P., Zhigilei, L. (eds) Lasers in Materials Science. Springer Series in Materials Science, vol 191. Springer, Cham. https://doi.org/10.1007/978-3-319-02898-9_2
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DOI: https://doi.org/10.1007/978-3-319-02898-9_2
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