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arXiv · 1107.3710

Numerical simulation of copper ablation by ultrashort laser pulses

PengJi Ding·BiTao Hu·YuHong Li
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Abstract

Using a modified self-consistent one-dimensional hydrodynamic lagrangian fluid code, laser ablation of solid copper by ultrashort laser pulses in vacuum was simulated to study fundamental mechanisms and to provide a guide for drilling periodic microholes or microgratings on the metal surface. The simulated laser ablation threshold is a approximate constancy in femtosecond regime and increases as the square root of pulse duration in picosecond regime. The ablation depth as a function of pulse duration shows four different regimes and a minimum for a pulse duration of ~ 12ps for various laser fluences. The influence of laser-induced plasma shielding on ablation depth is also studied.

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PengJi Ding, BiTao Hu, YuHong Li. 2011-07-19. Numerical simulation of copper ablation by ultrashort laser pulses. https://arxiv.org/abs/1107.3710

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