Periodic surface nanostructures induced by orthogonal femtosecond laser pulses on tungsten

Three types of surface nanostructures are fabricated on tungsten by adjusting azimuth angle θ of YVO4 birefringent crystal and laser parameters in experiment. Different surface structure morphologies are introduced and their features are investigated. The frequency characteristics of the three type...

Full description

Saved in:
Bibliographic Details
Published in:Optik (Stuttgart) 2022-02, Vol.251, p.168354, Article 168354
Main Authors: Qiao, Hongzhen, Liang, Guo, Shu, Fangjie, Wang, Xiangli, Cheng, Wenjing, Liu, Jie, Wang, Meng, Yang, Jianjun
Format: Article
Language:English
Subjects:
crossed linear polarizations
surface nanostructure
temporal delay
ultrafast laser pulse
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Three types of surface nanostructures are fabricated on tungsten by adjusting azimuth angle θ of YVO4 birefringent crystal and laser parameters in experiment. Different surface structure morphologies are introduced and their features are investigated. The frequency characteristics of the three type laser-induced surface nanostructures are studied by the fast Fourier transformation (FFT). By varying the azimuth angle of YVO4 crystal we can not only convert one-dimensional (1D) grating-like structures into two-dimensional (2D) surface structures, but also control the structural arrangement. Compared with traditional two-step sequential processing method, the dual orthogonal pulses generating through YVO4 birefringent crystal can induce better periodical 1D grating-like structure. Moreover, the 2D microbumps are mainly dependent on the energy deposition effect from dual pulses. We also provide the underlying texturing mechanism of final periodic surface structures.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2021.168354