Morphology control of laser-induced periodic surface structure on the surface of nickel by femtosecond laser
Morphology control of laser-induced periodic surface structure on the surface of nickel by femtosecond laser
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DOI：
10.3788/col201513.062201
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发表时间：
2015-06-10
影响因子：
3.5
通讯作者：
Wang, Qingsong
中科院分区：
文献类型：
--
作者：
Meng, Fantong;Hu, Jie;Wang, Qingsong
通过改变扫描速度和激光能量密度，揭示了镍表面低空间频率激光诱导周期性表面结构（LIPSS）和高空间频率激光诱导周期性表面结构（HSFL）之间的有趣转变。实验结果显示HSFL面积在整个LIPSS中的比例（即，在飞秒激光单脉冲序列作用下，偏振态随偏振方向的变化呈现准抛物线函数趋势。此外，在飞秒激光双脉冲序列下，还观察到K值随脉冲延迟的起伏变化。发现双脉冲序列的偏振方向决定了脉冲涨落的峰值。
An interesting transition between low spatial frequency laser-induced periodic surface structure (LIPSS) and high spatial frequency LIPSS (HSFL) on the surface of nickel is revealed by changing the scanning speed and the laser fluence. The experimental results show the proportion of HSFL area in the overall LIPSS (i.e., K) presents a quasi-parabola function trend with the polarization orientation under a femtosecond (fs) laser single-pulse train. Moreover, an obvious fluctuation dependence of K on the pulse delay is observed under a fs laser dual-pulse train. The peak value of the fluctuation is found to be determined by the polarization orientation of the dual-pulse train.