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Femtosecond laser fabrication of large-area periodic surface ripple structure on Si substrate

机译:飞秒激光在硅衬底上大面积周期性表面波纹结构的制造

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摘要

In this paper, we report the fabrication of a large area uniformly distributed periodic nano-ripple structure on silicon substrate through the proper scanning of a line-shaped femtosecond laser beam. The fabricated nano-ripple structure has a periodicity of ~600 nm and a ripple depth of ~300 nm. The modulation depth is much deeper than the one previously reported. The developed structure is demonstrated to be able to substantially reduce light reflection due to the effective optical coupling between the incident sunlight with the nano-ripple structure and exhibit an absorption enhancement of -41% compared with planar silicon wafer. The physics underlying the formation of the nano-ripple structure is also discussed.
机译:在本文中,我们报告了通过对线形飞秒激光束进行适当的扫描,在硅基板上制造了大面积均匀分布的周期性纳米波纹结构。制成的纳米波纹结构的周期为〜600 nm,纹波深度为〜300 nm。调制深度比以前报道的深度要深得多。事实证明,由于入射的日光与纳米波纹结构之间的有效光学耦合,因此所开发的结构能够显着减少光反射,并且与平面硅晶圆相比,吸收增强了-41%。还讨论了形成纳米波纹结构的物理原理。

著录项

  • 来源
    《Applied Surface Science》 |2014年第1期|134-138|共5页
  • 作者单位

    School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore,Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore;

    School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;

    Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore;

    Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore;

    School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;

    South University of Science and Technology of China, Shenzhen, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Femtosecond pulsed laser; Ripple formation; Si; Laser fluence; Optical reflection;

    机译:飞秒脉冲激光;波纹形成;激光通量;光学反射;

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