Journal
OPTICS LETTERS
Volume 45, Issue 13, Pages 3414-3417Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.396375
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- Ministry of Planning and Budget, Korea Institute of IndustrialTechnology [EO200015]
- National Research Council of Science & Technology (NST), Republic of Korea [EO200015] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Following femtosecond (fs) laser pulse irradiation, the formation of a new type of low-spatial-frequency laser-induced periodic surface structure (LSFL) patterns, namely, omnidirectional LSFLs (OD-LSFLs) with the periodic ordering of their orientations, are investigated on Ni in this Letter. Using a liquid crystal polymer patterned depolarizer, we periodically rotate the polarization of fs laser pulses across the laser spot and create OD-LSFLs by raster scanning fs laser pulses. We also show that the period of the OD-LSFL orientation rotation can be controlled with the defocused distance, and OD-LSFLs can significantly expand the viewing angle of the structural colors in the azimuthal direction without noticeable color degradations. (C) 2020 Optical Society of America
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