The splash created by intense laser pulse impact onto a liquid tin layer is studied experimentally using time-delayed stroboscopic shadowgraphy. An 8-ns infrared (1064 nm) laser pulse is focused onto a deep liquid tin pool. Various laser spot sizes (70, 120, and 130 \(\upmu\)m in diameter) and various laser pulse energies (ranging 2.5–30 mJ) are used, resulting in laser fluences of \(\sim\) 10–1000 J/cm\(^2\) inducing pronounced splashing. Specifically, we study the time evolution of the splash crown-width. The crown width expansion velocity is found to be linearly dependent on the laser energy, and independent of the focal spot size. A collapse of all crown width evolution data onto a single master curve confirms that the hydrodynamic evolution of our laser-impact-induced splash is equivalent to droplet-impact-induced splashing. Laser-impact splashing is particularly relevant, e.g. for high-brightness laser-assisted discharge-produced plasma and laser-produced plasma sources of extreme ultraviolet light for nanolithography.

使用延时的频闪式阴影照相法，对由强烈的激光脉冲撞击到液态锡层上而产生的飞溅进行了实验研究。将一个8 ns的红外（1064 nm）激光脉冲聚焦到一个深的液态锡池上。使用各种激光光斑大小（直径分别为70、120和130  \（\ upmu \） m）和各种激光脉冲能量（范围为2.5–30 mJ），导致激光通量为\（\ sim \）  10–1000焦耳/厘米\（^ 2 \）引起明显的飞溅。具体来说，我们研究了飞溅冠宽的时间演变。发现胎冠宽度膨胀速度与激光能量成线性关系，并且与焦点尺寸无关。将所有胎冠宽度演变数据折叠到一条主曲线上可以确认，我们的激光撞击诱发的飞溅的流体动力学演化等效于液滴撞击诱发的飞溅。激光冲击飞溅特别重要，例如，用于纳米光刻的高亮度激光辅助放电产生的等离子体和极紫外光的激光产生的等离子体源。