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Ultrashort double pulse laser ablation of metals

机译:金属超短双脉冲激光烧蚀

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摘要

The peculiarities of laser microablation and plasma re-heating with ultrashort (50 fs-10 ps) double pulses were studied. Three regimes of laser/metal target interaction were observed as a function of double-pulse delay: without any plasma shielding (Δt_(12) ≤ 1 ps), intermediate (1≤Δt_(12)≤10 ps) and with total plasma shielding (from 10 to 250 ps). The optimal plasma re-heating regime with the highest plasma intensity and reproducibility was determined to correspond to the double pulses delay of 100-200 ps. The pulses in the 50 fs-2 ps range were observed to give approximately the same ablation efficiency with a metal target.
机译:研究了超短脉冲(50 fs-10 ps)双脉冲激光微烧蚀和等离子体再加热的特点。观察到激光/金属靶相互作用的三种情况是双脉冲延迟的函数:无任何等离子体屏蔽(Δt_(12)≤1 ps),中等(1≤Δt_(12)≤10ps)和总等离子体屏蔽(从10到250 ps)。确定具有最高等离子体强度和重现性的最佳等离子体再加热方案,以对应于100-200 ps的双脉冲延迟。观察到在50 fs-2 ps范围内的脉冲与金属靶材产生的烧蚀效率大致相同。

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