Nanograting formation through surface plasmon fields induced by femtosecond laser pulses
Nanograting formation through surface plasmon fields induced by femtosecond laser pulses
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DOI：
10.1063/1.4826078
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发表时间：
2013-10-21
影响因子：
3.2
通讯作者：
Miyaji, Godai
中科院分区：
文献类型：
--
作者：
Miyazaki, Kenzo;Miyaji, Godai
用叠加的多束低通量飞秒（fs）激光脉冲辐照固体表面，烧蚀通常会导致在目标表面上形成周期性纳米结构。我们证明了纳米结构的自组织过程可以被调节以在空气中的目标表面上制造均匀的纳米光栅。一个简单的两步烧蚀过程被用来控制纳米级的能量沉积，应通过激发表面等离子体激元（SPPs）在飞秒激光表面相互作用。对于结晶氮化镓获得的结果准确地表示SPP的单个空间驻波模式的性质，SPP的周期性增强的近场烧蚀靶表面以形成具有类似于200 nm的周期的纳米光栅。模型目标的计算结果再现以及观察到的纳米光栅周期，并解释其特征属性的起源。(C)2013年作者。所有文章内容，除非另有说明，是根据知识共享署名3.0未移植许可证许可。
Ablation of solid surfaces irradiated with superimposed multiple shots of low fluence femtosecond (fs) laser pulses often results in the formation of periodic nanostructures on the target surface. We demonstrate that the self-organization process of nanostructuring can be regulated to fabricate a homogeneous nanograting on the target surface in air. A simple two-step ablation process was used to control the nanoscale energy deposition that should be developed through the excitation of surface plasmon polaritons (SPPs) during the fs laser-surface interaction. The results obtained for crystalline gallium nitride represent exactly the nature of a single spatial standing wave mode of SPPs of which periodically enhanced near-fields ablate the target surface to form the nanograting with a period of similar to 200 nm. The calculated results for a model target reproduce well the observed nanograting period and explain the origin of its characteristic properties. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.