摘要
理论上研究了用一束涡旋光和一个振幅掩模制作二维周期或准周期离散无衍射光场的方法.通过改变涡旋光的拓扑荷数和掩模上小孔数,模拟得到了不同的四角、五角和六角无衍射光场的强度分布、相位结构和远场衍射图.另外,还总结了关于涡旋光拓扑荷数及掩模小孔数这两个参数和产生的无衍射光场之间的有趣的规律.
We investigate theoretically the two -dimensional periodic and quasi -periodic discrete non - diffracting optical fields by a vortex beam and an amplitude mask with several holes on a circle. Through varying the topological charge and the number of holes on the mask we can get different lattices. And four - , five - and six- fold non -diffracting beams＇ intensity distributions, vortex structures, far- field diffraction patterns and corresponding phase patterns are presented by computer simulation. In addition, we conclude a series of interesting laws about the relation of the generated wave fields and the predetermined topological charge and number of holes.
出处
《山东师范大学学报（自然科学版）》
CAS
2016年第2期81-85,共5页
Journal of Shandong Normal University(Natural Science)
基金
国家自然科学基金资助项目(11304187
11247022
11374108)
山东省高等教育科学资助项目(J14LA55)
关键词
离散无衍射光束
涡旋光
拓扑荷
掩模
discrete non -diffracting beam
vortex beam
topological charge
mask
