Spatial Correlation Properties of Tightly Focused J0-Correlated Azimuthally Polarized Vortex Beams  

作　　者：RAO Lian-Zhou LIN Hui-Chuan SUN Qing-Quan 饶连周;林惠川;孙清泉(College of Electromechanical Engineering,Sanming University,Sanming 365004)

机构地区：[1]College of Electromechanical Engineering,Sanming University,Sanming 365004

出　　处：《Chinese Physics Letters》2013年第5期89-92,共4页中国物理快报（英文版）

基　　金：the Natural Science and Technology Project of the Education Bureau of Fujian Province under Grant No JK2011054;the Key Engineering Project of the Education Bureau of Fujian Province under Grant No HX200804。

摘　　要：Based on vectorial Debye diffraction theory, the spatial correlation properties in the focal region of a J0 -correlated azimuthally polarized vortex beam through a high numerical aperture (NA) are analyzed. The expressions for a pair of points on the axis of symmetry and for a pair of points in the focal plane are derived. It is found that the longitudinal and transverse coherence lengths in the focal region change with the variation in the topological charge and coherence parameter of the vortex field, together with the NA values. In addition, the degree of coherence is shown to possess phase singularities.

关 键 词：VORTEX SYMMETRY TOPOLOGICAL 

分 类 号：O43[机械工程—光学工程]