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首页> 外文期刊>Physical review. B, Condensed Matter And Materials Physics >Numerical study of the thermal ablation of wet solids by ultrashort laser pulses
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Numerical study of the thermal ablation of wet solids by ultrashort laser pulses

机译：超短激光脉冲热烧蚀固体的数值研究

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摘要

The ablation by ultrashort laser pulses at relatively low fluences (i.e., in the thermal regime) of solids wetted by a thin liquid film is studied using a generic numerical model. In comparison with dry targets, the liquid is found to significantly affect ablation by confining the solid and slowing down the expansion of the laser-heated material. These factors affect the relative efficiency of the various ablation mechanisms, leading, in particular, to the complete inhibition of phase explosion at lower fluences, a reduced ablation yield, and significant changes in the composition of the plume. As a consequence, at fluences above the ablation threshold, the size of the ejected nanoclusters is lower in presence of the liquid. Our results provide a qualitative understanding of the effect of wetting layers on the ablation process.
机译：使用通用数值模型研究了超短激光脉冲在较低注量（即在热态）下被液体薄膜润湿的固体的烧蚀。与干靶相比，发现液体通过限制固体和减慢激光加热材料的膨胀而显着影响烧蚀。这些因素影响各种消融机制的相对效率，特别是导致以较低的通量完全抑制相爆炸，降低的消融收率以及烟羽成分的显着变化。结果，在注量高于消融阈值时，在存在液体的情况下，喷射的纳米团簇的尺寸较小。我们的结果提供了对润湿层对消融过程影响的定性理解。

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