Abstract

Time and spatial-resolved interferometric technique for continuous registration of motion of titanium sample surface in the picosecond range induced by femtosecond laser pulses of various fluence was used. A qualitative difference in the dynamics of ablation plume expansion was found in case of spallation and phase explosion regimes. The temporal delay of the ejection onset of the excited material surface in a form of a vapor–droplet mixture depending on laser fluence is determined, and the value of the phase explosion threshold is estimated.

中文翻译：

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飞秒激光照射下钛靶烧蚀羽流动力学

摘要

使用时间和空间分辨干涉技术，连续记录由各种通量的飞秒激光脉冲在皮秒范围内钛样品表面的运动。在散裂和相爆炸状态下，消融羽流膨胀动力学存在质的差异。确定取决于激光通量的，蒸汽-液滴混合物形式的受激材料表面喷射开始的时间延迟，并估算相爆阈值。