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Colorizing silicon surface with regular nanohole arrays induced by femtosecond laser pulses

机译:飞秒激光脉冲诱导的具有规则纳米孔阵列的硅表面着色

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摘要

We report on the formation of one- and two-dimensional (1D and 2D) nanohole arrays on the surface of a silicon wafer by scanning with a femtosecond laser with appropriate power and speed. The underlying physical mechanism is revealed by numerical simulation based on the finite-difference time-domain technique. It is found that the length and depth of the initially formed gratings (or ripples) plays a crucial role in the generation of 1D or 2D nanohole arrays. The silicon surface decorated with such nanohole arrays can exhibit vivid structural colors through efficiently diffracting white light.
机译:我们报告了用飞秒激光以适当的功率和速度进行扫描,从而在硅晶片的表面上形成了一维和二维(一维和二维)纳米孔阵列。通过基于有限差分时域技术的数值模拟揭示了潜在的物理机制。发现最初形成的光栅(或波纹)的长度和深度在1D或2D纳米孔阵列的产生中起着至关重要的作用。用这种纳米孔阵列装饰的硅表面可以通过有效地衍射白光而表现出鲜艳的结构颜色。

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