Abstract
The effect of material surface morphology on the periodic
subwavelength of nano-structures induced by a femtosecond (fs) laser was
investigated systematically from the initial surface roughness, the
different scratches, the pre-formed ripples, and the “layer-carving”
technology experiments. The results of the comparative experiments
indicate that the initial surface conditions of the target surface have no
obvious effects on the spatial structured periods (SSPs) and the ripple
orientation of the periodic nano-structures induced by a fs laser, which
agreed well with the foretold present surface two-plasmon resonance (STPR)
model. Furthermore, different shapes of nano-grids with high regularity
and uniformity were obtained by fs-laser fabrication.
© 2018 Chinese Laser Press
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