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Effects of nanostructure-covered femtosecond laser-induced periodic surface structures on optical absorptance of metals
By: A.Y. Vorobyev; Chunlei Guo;
2007 / Springer Science+Business Media / 0947-8396
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.