四波干涉形成光学涡旋  

Optical vortex generated by the interference of four plane waves

作　　者：王艳花[1] 李平[2] 刘树田[1] 

机构地区：[1]哈尔滨工业大学应用物理系,黑龙江哈尔滨150001 [2]哈尔滨师范大学呼兰学院,黑龙江哈尔滨150500

出　　处：《哈尔滨工业大学学报》2004年第11期1494-1498,共5页Journal of Harbin Institute of Technology

摘　　要：应用四个相对于z轴对称的平面波相干涉,形成具有规则分布的涡旋列.这些涡旋列在垂直于z轴的不同平面上具有相同的位置,即使存在噪音,这样的分布也能得到准确的涡旋点位置.给出了产生涡旋列所需的初始位相条件,计算出了涡旋的列间距并分析了与波矢的关系.在涡旋的局部性质中,给出了用这种四波干涉的方法所形成涡旋的拓扑荷数,以及以涡旋点为中心某一特定微小半径圆周上的强度.Regular optical vortex sequences are generated by interferences of four plane waves which are symmetrical to the z axis. All the vortex sequences occupy the same coordinates in the planes normal to z axis. In this way, it is easy to obtain the exact position of each vortex in spite of noises. The initial phase condition is given in order to generate the optical vortex sequences. The distances between the adjacent vortex arrays are calculated. Its relationship with the wave-vectors is analyzed. For the local characteristics of the vortex points, the number of the topological charges and the intensity on tiny circles around the vortices with arbitrary radii are given.

关 键 词：涡旋 平面波 干涉 

分 类 号：O436[机械工程—光学工程]