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Ki, Hyungson
Laser Processing & Multiphysics Systems Laboratory
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  • Laser materials processing

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Femtosecond laser patterning based on the control of surface reflectance

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Title
Femtosecond laser patterning based on the control of surface reflectance
Author
Lee, KeunheeKi, Hyungson
Issue Date
2019-11
Publisher
Elsevier B.V.
Citation
APPLIED SURFACE SCIENCE, v.494, pp.187 - 195
Abstract
In this study, we present a femtosecond laser patterning method based on the control of surface reflectance. This laser patterning method is based on the laser-induced periodic surface structure (LIPSS), and we first studied how the LIPSS pattern evolves and the corresponding surface reflectance changes as process parameters are varied in a large process window. It was found that the reflectance of stainless steel can be changed from 66% to 5%, and by choosing the proper parameters, elegant patterns can be fabricated. Using the method, a multi-faceted ball was successfully fabricated by employing 22 surface reflectance values. The mechanism behind the reflectance change and the effect of the shield gas on the surface morphology and patterning quality were also investigated.
URI
https://scholarworks.unist.ac.kr/handle/201301/27260
URL
https://www.sciencedirect.com/science/article/pii/S0169433219321993?via%3Dihub
DOI
10.1016/j.apsusc.2019.07.163
ISSN
0169-4332
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