Femtosecond laser fabrication of LIPSS-based waveplates on metallic surfaces
Keywords: 
LIPSS
Laser
Femtosecond
Nanostructure
Polarization
Waveplate
Issue Date: 
2020
ISSN: 
0169-4332
Note: 
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Citation: 
San-Blas, A. (Alejandro); Martínez-Calderón, M. (Miguel); Buencuerpo, J. (Jerónimo); et al. "Femtosecond laser fabrication of LIPSS-based waveplates on metallic surfaces". Applied Surface Science. 520 (146328), 2020,
Abstract
A fast and reliable method for the fabrication of polarization modifying devices using femtosecond laser is reported. A setup based on line focusing is used for the generation of LIPSS on stainless steel, processing at different speeds between 0.8 and 2.4 mm/s with constant energy per pulse of 1.4 mJ. SEM and AFM characterizations of the LIPSS show a progressive increase in period as the processing speed increases, while height remains approximately constant in the studied range. Optical characterization of the devices shows an induced change in the polarization of the reflected beam that varies with the processing speed, which allows a controlled fabrication of these devices.

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