Evolution of femtosecond laser-induced periodic surface structures: from nanoholes to regular structures

摘要

Femtosecond laser-induced periodic surface structures have opened broad prospects in the aspect of high-efficientand low-cost nanotextured patterning, yet defined great challenges on how to keep the periodicity in a macroarea. Herein, we report a transition from non-periodicity to periodicity as the scan strategies changing. Bysuppressing the transition from the initial structures to the nanogratings with long-range order, arbitrary highresolutiondirect writing patterns have been obtained in a large area. We attribute this phenomenon to thedynamic evolution of the near-field energy deposition around the pre-existing structures. This approach pavesanother way to high-precision laser processing.