Self-organized tungsten nanospikes grown on subwavelength ripples induced by femtosecond laser pulses
Self-organized tungsten nanospikes grown on subwavelength ripples induced by femtosecond laser pulses
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DOI：
10.1364/oe.15.015741
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发表时间：
2007-11-26
期刊：
影响因子：
3.8
通讯作者：
Wang, Li-Jun
中科院分区：
文献类型：
--
作者：
Zhao, Quan-Zhong;Malzer, Stefan;Wang, Li-Jun
本文报道了单束800 nm飞秒激光脉冲在亚波长周期波纹上产生的纳米级钨峰的形成。纳米尖峰的直径从10纳米到100纳米不等，长度可达250纳米。纳米尖从纹波结构的脊向波谷方向移动，与光的偏振无关。在辐照表面液相的非均匀成核和表面粗糙度的不均匀性被认为是纳米尖的形成机制。(c) 2007年美国光学学会。
We report on the formation of nanoscale tungsten spikes generated on subwavelength periodic ripples which built up by single beam 800 nm femtosecond laser pulses. The nanospikes have a diameter ranging from 10 to 100 nm and are up to 250 nm in length. The nanospikes orientate from the ridges toward the valleys of the ripple structures independent of the polarization of the light. The heterogeneous nucleation of the liquid phase at the irradiated surface and the inhomogeneous surface roughness are considered as the mechanism of this nanospike formation. (c) 2007 Optical Society of America.