Ultrafast dynamics of femtosecond laser-induced periodic surface pattern formation on metals
Ultrafast dynamics of femtosecond laser-induced periodic surface pattern formation on metals
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DOI：
10.1063/1.2146067
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发表时间：
2005-12-19
影响因子：
4
通讯作者：
Guo, CL
中科院分区：
文献类型：
--
作者：
Wang, JC;Guo, CL
在本文中，我们进行了比较研究的周期性结构的表面上的三种不同的贵金属，铜，银，和Au，以下飞秒激光辐射。在相同的实验条件下，激光诱导的表面图案显示出明显不同的水平上的三种不同的金属的形态清晰度。基于金属熔化的简单计算无法解释模式差异。我们发现，我们的观察结果从两个超快过程的竞争，电子-声子能量耦合和热电子扩散，飞秒激光加热金属。(c)2005年美国物理学会。
In this paper, we perform a comparison study of periodic structures on the surfaces of three different noble metals, Cu, Ag, and Au, following femtosecond laser radiation. Under identical experimental conditions, laser-induced surface patterns show distinctly different level of morphological clearness on the three different metals. Simple calculations based on metal melting fail to explain the pattern differences. We show that our observation result from the competition of two ultrafast processes, electron-phonon energy coupling and hot electron diffusion, following femtosecond laser heating of metals. (c) 2005 American Institute of Physics.