Origin of periodicity in nanostructuring on thin film surfaces ablated with femtosecond laser pulses
Origin of periodicity in nanostructuring on thin film surfaces ablated with femtosecond laser pulses
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DOI：
10.1364/oe.16.016265
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发表时间：
2008-09-29
期刊：
影响因子：
3.8
通讯作者：
Miyazaki, Kenzo
中科院分区：
文献类型：
--
作者：
Miyaji, Godai;Miyazaki, Kenzo
我们报告的物理过程负责周期性纳米结构的形成在飞秒激光烧蚀薄膜表面。研究发现，随着激光脉冲或能量密度的增加，纳米级烧蚀痕迹的初始随机分布呈周期性结构。结果表明，这种周期性的形成是由于表面等离子体激元的激发导致了表面层局域场的周期性增强。所估计的场周期与所观察到的纳米结构的尺寸非常一致。(C)2008年美国光学学会
We report physical processes responsible for the periodic nanostructure formation in femtosecond-laser ablation of thin film surfaces. It has been found that an initial random distribution of nanoscale ablation traces is periodically structured with an increase in superimposed laser pulses or fluence on diamond-like carbon film used as the target. The results show that the formation of periodicity can be attributed to the excitation of surface plasmon polaritons to induce the periodic enhancement of local fields in the surface layer. The estimated field period is in good agreement with the observed size of nanostructures. (C) 2008 Optical Society of America