A uniform 290 nm periodic square structure on ZnO fabricated by two-beam femtosecond laser ablation

作者:Huang, M.*; Zhao, F. L.; Jia, T. Q.; Cheng, Y.; Xu, N. S.; Xu, Z. Z.
来源:Nanotechnology, 2007, 18(50): 505301.
DOI:10.1088/0957-4484/18/50/505301

摘要

A uniform submicron periodic square structure was fabricated on the surface of ZnO by a technique of two linearly polarized femtosecond laser beams with orthogonal polarizations ablating material alternately. The formed two-dimensional ordering submicron structure consists of close-packed submicron squares with a spacial periodicity of 290 nm, which arises from the intercrossing of two orthogonal submicron ripple structures induced by the two beams respectively. The result demonstrates a noninterference effect of two-beam ablation based on the alternate technique, which should come from the polarization-dependent enhancement of the subwavelength ripple structure and the large interval of two alternate pulses. This two-beam alternate ablation technique is expected to open up prospects for the submicron fabrication of wide-bandgap materials.