边缘衍射光学涡旋光束中相位奇点的演化
光学
2017-03-10 v1
摘要
我们从理论和实验上研究了当屏幕边缘在横向平面内从光束外围向轴进行永久平移时，边缘衍射光学涡旋光束的固定横截面内振幅零点的迁移。通常，振幅零点（光学涡旋核）描述螺旋状轨迹。当屏幕边缘均匀推进时，振幅零点的运动并不平滑，有时显示出异常高的速率，给人一种从一个位置瞬时“跳跃”到另一个位置的印象。我们分析了这些跳跃的性质、条件和机制，并表明它们与涉及光学涡旋偶极子的“产生-湮灭”拓扑反应有关。
引用
@article{arxiv.1605.06751,
title = {Evolution of the phase singularities in edge-diffracted optical-vortex beams},
author = {Aleksandr Bekshaev and Lidiya Mikhaylovskaya and Aleksey Chernykh and Anna Khoroshun},
journal= {arXiv preprint arXiv:1605.06751},
year = {2017}
}
备注
3 pages, 3 figures. This is the enhanced abstract of the report submitted to the International Conference on Advanced Optoelectronics and Lasers CAOL 2016 (September, 2016, Odessa, Ukraine) and forms a continuation of the previous work arXiv:1511.01275