Influences of Focusing Conditions on Dynamics of Laser Ablation at a Solid–Liquid Interface
Influences of Focusing Conditions on Dynamics of Laser Ablation at a Solid–Liquid Interface
复制标题
聚焦条件对固液界面激光烧蚀动力学的影响
DOI：
10.7567/apex.6.122701
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发表时间：
2013
影响因子：
2.3
通讯作者：
Yoshiro Ito
中科院分区：
文献类型：
--
作者：
T. Nguyen;R. Tanabe;Yoshiro Ito
利用自行设计的时间分辨光弹性成像技术，研究了相对于样品表面的聚焦条件对液体下激光诱导烧蚀中冲击过程的影响。纳秒激光脉冲聚焦在浸泡在液体中的环氧树脂块的表面上。当表面靠近焦点时，发生在固-液界面上的击穿导致激光诱导的应力减小。在焦点以上位置，应力波强度主要由激光脉冲能量决定，而不是由注量决定。液体中的杂质在光路上的多个位置引发击穿，降低了应力波强度。
Influences of focusing conditions relative to a sample surface on shock processes in under-liquid laser-induced ablation were studied using a custom-designed time-resolved photoelasticity imaging technique. A nanosecond laser pulse was focused onto the surface of epoxy-resin blocks immersed in liquids. When the surface was located close to the focal point, the breakdown that occurred on the solid–liquid interface resulted in reduced laser-induced stress. At positions above the focal point, the stress-wave intensity was mainly determined by laser pulse energy, but not by fluence. Impurities in liquids initiated breakdowns at multiple sites along the light path and reduced stress-wave intensity.