Effects of nanostructure-covered femtosecond laser-induced periodic surface structures on optical absorptance of metals
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- Vorobyev, A. & Guo, C. Appl. Phys. A (2007) 86: 321. doi:10.1007/s00339-006-3800-0
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In this paper, we find, for the first time, that optical absorptance of metals can be significantly enhanced by a new type of surface structures following femtosecond laser ablation, namely nanostructure-covered periodic surface structures. Especially, the effect of the nanostructure-covered periodic structures on optical absorptance of metals has a clear polarization dependence that suggests a more controllable way to modify material optical properties with femtosecond laser processing.