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One-step fabrication of bi- and quad-directional femtosecond laser-induced periodic surface structures on metal with a depolarizer

Title
One-step fabrication of bi- and quad-directional femtosecond laser-induced periodic surface structures on metal with a depolarizer
Authors
Hwang, Taek YongSHIN, HEEDEUKKang, JeongjinLee, ByeonghwakGuo, Chunlei
Date Issued
Jul-2019
Publisher
Elsevier BV
Abstract
With femtosecond (fs) laser pulse irradiation, a simple but efficient technique to fabricate bi- and quad-directional low spatial frequency laser-induced periodic surface structures (BD- and QD-LSFLs) is suggested on metals. By inserting a quartz wedge achromatic depolarizer prior to the focusing optics, we change the polarization of fs laser pulses periodically in one dimension within the laser spot, and find that this method leads to the creation of BD- and QD-LSFLs by simply raster scanning fs laser pulses on Ni. It is also demonstrated that the interval of orientation change of BD-LSFLs can be manipulated with defocus. © 2019
URI
http://oasis.postech.ac.kr/handle/2014.oak/99415
ISSN
0169-4332
Article Type
Article
Citation
Applied Surface Science, vol. 493, page. 231 - 238, 2019-07
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 SHIN, HEEDEUK
Dept of Physics
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