Evolution of Femtosecond Laser-Induced Surface Ripples on Lithium Niobate Crystal Surfaces
Evolution of Femtosecond Laser-Induced Surface Ripples on Lithium Niobate Crystal Surfaces
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DOI：
10.7567/apex.6.112701
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发表时间：
2013-11
影响因子：
2.3
通讯作者：
H. Shimizu;G. Obara;M. Terakawa;E. Mazur;M. Obara
中科院分区：
文献类型：
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作者：
H. Shimizu;G. Obara;M. Terakawa;E. Mazur;M. Obara
利用飞秒激光脉冲辐照在锂离子电池晶体表面制备了周期性的涟漪结构，并观察了这些结构在连续激光脉冲辐照下的演化。在几个激光脉冲之后，我们观察到纳米棒形状的陨石坑，它们彼此对齐，但随机分布在表面上。纳米晶体是由晶体表面缺陷处的纳米烧蚀引起的。随着脉冲数的增加，出现了旁瓣状的纳米凹坑，并且从晶体表面处的初始纳米棒状凹坑散射的光与入射光干涉，导致周期性结构的形成。
We fabricated periodic ripple structures on the surface of a lithium niobate crystal by irradiation with femtosecond laser pulses and observed the evolution of these structures under irradiation with successive laser pulses. After just a few laser pulses we observed nanorod-shaped craters, aligned with each other but randomly distributed over the surface. The nanocraters are caused by nanoablation at defects in the crystal surface. With increasing pulse number, side-lobed nanocraters appear and light scattered from the initial nanorod-shaped craters at the crystal surface interferes with the incident light, causing the formation of periodic structures.