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首页> 外文期刊>Applied Physics >Laser fluence dependence of ripple formation on fused silica by femtosecond laser irradiation
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Laser fluence dependence of ripple formation on fused silica by femtosecond laser irradiation

机译：通过飞秒激光照射熔化模块对熔化二氧化硅的激光流量依赖性

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摘要

Laser-induced periodic surface structures (LIPSS, ripples) have attracted great attentions in the fields of surfaces and interfaces, yet their origin still remains puzzling, especially for dielectrics. In this study, a comparative study of the formation of two distinct classes of ripples on fused silica is provided by carefully adjusting the key parameters of laser fluence and pulse number. Two different ablation regimes are identified for LIPSS formation. The threshold fluence of F=4.07J/cm(2) is defined for the transition from high spatial frequency LIPSS to low spatial frequency LIPSS, which is independent of pulse number. Pulse-to-pulse results show the unique formation processes for each class of LIPSS in different fluence regimes. In the fluence range below the transition threshold (2.54J/cm(2)F4.07J/cm(2)), the formation of high spatial frequency LIPSS starts from randomly distributed nanogrooves perpendicularly orientated to E, indicating the excitation of surface-plasmon polaritons as a primary formation mechanism. In the higher fluence regime (F4.07J/cm(2)), the development of a thin rim surrounding an ablation crater into straight ridges spreading across the crater is observed for the formation of low spatial frequency LIPSS, suggesting a thermal and fluid process involved in the LIPSS formation. The results show that laser fluence plays a key role in controlling the origin of ripples, while pulse number mainly contributes to the subsequent growth of microstructures.
机译：激光诱导的周期性表面结构（唇缘，涟漪）在表面和界面的田地中引起了极大的关注，但它们的起源仍然仍然是令人费解的，特别是对于电介质。在该研究中，通过仔细调整激光量和脉冲数的关键参数，提供了对熔融二氧化硅中两个不同类别的涟漪形成的比较研究。针对嘴唇形成鉴定出两种不同的消融制度。 F = 4.07J / cm（2）的阈值流量被定义用于从高空间频率嘴唇到低空间频率嘴唇的过渡，这与脉冲数无关。脉冲到脉冲结果显示了各类嘴唇的独特形成过程，不同的流量制度。在过渡阈值以下的流量范围内（2.54J / cm（2） 4.07J / cm（2））中，观察到将消融火山口的薄边缘的开发成直线脊，以形成低空间频率嘴唇，表明热和流体嘴唇形成的过程。结果表明，激光物流量在控制涟漪的起源方面发挥着关键作用，而脉冲数主要有助于随后的微观结构生长。

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  • 来源
    《Applied Physics》 |2019年第4期|256.1-256.8|共8页
  • 作者

    Shi Xuesong; Xu Xuefeng;

  • 作者单位

    Beijing Forestry Univ Sch Technol Beijing 100083 Peoples R China;

    Beijing Forestry Univ Sch Technol Beijing 100083 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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