Critical pulse in multi-shot femtosecond laser ablation on metallic surfaces
Pengjie Wang,
Xiangguang Kong,
Fugong Qi
et al.
Abstract:Thermal effect remains a thorny issue for femtosecond-laser surface engineering and nanostructuring on metallic targets with high pulse energies or high repetition rates, which needs to be paid adequate attentions. Herein, we have experimentally investigated the heat diffusion and accumulations during single-shot and multi-shot femtosecond laser ablation on metallic surfaces. We have for the first time observed a novel phenomenon that the thermal effect was intensified abruptly when the laser-pulse number goes… Show more
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