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Proceedings Paper

Evolution of titanium surfaces irradiated by femtosecond laser pulses with different wavelengths
Author(s): Guoqiang Li; Jiawen Li; Xiaohong Li; Zhiqiang Zhu; Yanlei Hu; Jiaru Chu; Wenhao Huang
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Paper Abstract

This paper reports on the evolution of femtosecond laser induced periodic surface structures (LIPSSs) on titanium surface irradiated with different wavelengths. By SEM observations, it is noted that different nanostructures with respective surface features depend highly on the laser wavelength and the laser fluence. The period of LIPSSs formed at the laser fluence just above the ablation threshold is shorter than the laser wavelength, as well as dependence on the incident wavelength. Experiments using wavelength of 600 and 1500 nm, studies are performed in more detail. The period and the depth of the grooves of LIPSSs are increased with the increase of laser fluence at wavelength of 600nm. The created structures on the surface at the laser fluence of 0.42 J/cm2 would significantly influence the field intensity distribution on the surface. The redistribution of the electric field intensity plays a crucial role in the creation of the HSFLs formed on the ridges of the LIPSSs, and the period decreases to half. Another kind of HSFLs whose orientation is perpendicular to the sidewalls of LIPSSs is created at wavelength of 1500nm. These HSFLs lie at the bottom of the valleys between both the LIPSSs and new formed grooves. As compared with the surface nanostructures formed at wavelength of 600 nm, the formation of identical HSFLs is induced with smaller laser fluence at wavelength of 1500 nm.

Paper Details

Date Published: 22 June 2013
PDF: 5 pages
Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 87691V (22 June 2013); doi: 10.1117/12.2021098
Show Author Affiliations
Guoqiang Li, Univ. of Science and Technology of China (China)
Jiawen Li, Univ. of Science and Technology of China (China)
Xiaohong Li, Southwest Univ. of Science and Technology (China)
Zhiqiang Zhu, Univ. of Science and Technology of China (China)
Yanlei Hu, Univ. of Science and Technology of China (China)
Jiaru Chu, Univ. of Science and Technology of China (China)
Wenhao Huang, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 8769:
International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013)
Chenggen Quan; Kemao Qian; Anand Asundi, Editor(s)

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