Time-resolved surface scattering imaging of organic liquids under femtosecond KrF laser pulse excitation
Time-resolved surface scattering imaging of organic liquids under femtosecond KrF laser pulse excitation
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飞秒 KrF 激光脉冲激发下有机液体的时间分辨表面散射成像
DOI：
10.1063/1.122816
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发表时间：
1998
影响因子：
4
通讯作者：
H. Masuhara
中科院分区：
文献类型：
--
作者：
K. Hatanaka;T. Itoh;T. Asahi;N. Ichinose;S. Kawanishi;T. Sasuga;H. Fukumura;H. Masuhara
在飞秒KrF激光烧蚀条件下，对液态氯化苄和液态甲苯进行了时间分辨表面散射成像。直到1 ns才得到散射图像，而当激光辐照量超过25 mJ/cm2时，散射从2 ns开始，随着时间的推移，散射强度逐渐增大。激光通量越高，增加的斜率越陡。散射是由于表面粗糙度，这是宏观形态变化的初始阶段。以磨砂熔融硅片为参考样品，通过散射强度估计表面均方根粗糙度。在10ns内，表面粗糙度增加到几百nm。
Time-resolved surface scattering imaging was performed for liquid benzyl chloride and liquid toluene under femtosecond KrF laser ablation conditions. No scattering image was obtained until 1 ns, while scattering started from 2 ns when the laser fluence exceeded 25 mJ/cm2, and its intensity increased with the passage of time. The higher the laser fluence was, the steeper the increasing slope was. The scattering is due to surface roughness, which is the initial stage of macroscopic morphological changes. Root-mean-square surface roughness was estimated from the scattering intensity by using frosted fused-silica plates as reference samples. The induced surface roughness increases to a few hundred nm in 10 ns.