Wang Shaojun, Jiang Lan, Han Weina, Liu Wei, Hu Jie, Wang Suocheng, Lu Yongfeng
Opt Lett. 2020 Apr 15;45(8):2411-2414. doi: 10.1364/OL.388770.
We achieved the controllable formation of laser-induced periodic surface structures (LIPSSs) on ZnO films deposited on fused silica induced by modulated temporally shaped femtosecond (fs) laser pulses (800 nm, 50 fs, 1 kHz) through the laser scanning technique. Two-dimensional (2D) high spatial frequency LIPSSs (HSFLs) with a period from 100 to 200 nm could be flexibly modulated based on the preprocessed nanostructures with appropriate fs laser irradiation conditions (fluence, scanning speed, and pulse delay). The finite-difference time-domain (FDTD) method combined with the Drude model was employed to calculate the redistributions of electric fields, which suggested the origin of HSFL formation.
我们通过激光扫描技术，利用调制的时域飞秒（fs）激光脉冲（800纳米，50飞秒，1千赫兹），在沉积于熔融石英上的氧化锌薄膜上实现了激光诱导周期性表面结构（LIPSSs）的可控形成。基于适当的飞秒激光辐照条件（能量密度、扫描速度和脉冲延迟），利用预处理的纳米结构，可以灵活调制周期为100至200纳米的二维（2D）高空间频率LIPSSs（HSFLs）。采用时域有限差分（FDTD）方法结合德鲁德模型来计算电场的重新分布，这揭示了HSFL形成的起源。
