Chinese Optics Letters, 2020, 18 (1): 013101, Published Online: Dec. 12, 2019
Controllable annulus micro-/nanostructures on copper fabricated by femtosecond laser with spatial doughnut distribution Download: 906次
Abstract
In this study, we propose an effective method for the fabrication of annulus micro-/nanostructures by a femtosecond laser doughnut beam. Compared with the traditional Bessel annulus beam shaping system, this method greatly compresses the light propagation path. It is theoretically and experimentally demonstrated that the obtained axial section of the peak envelope in the processing area is two waists of the isosceles triangle. By moving the relative position of the sample, annulus microstructures with different diameters on copper sheet could be fabricated. In addition, laser induced periodic surface structures with controllable direction are fabricated by this optical system.
Biwei Wu, Cong Wang, Zhi Luo, Junhui Li, Shu Man, Kaiwen Ding, Ji’an Duan. Controllable annulus micro-/nanostructures on copper fabricated by femtosecond laser with spatial doughnut distribution[J]. Chinese Optics Letters, 2020, 18(1): 013101.