Spirally polarized axisymmetric Bessel-modulated Gaussian beam

被引：11
|
作者：
Gao, Xiumin [1 ,4 ]
Zhan, Qiufang [2 ]
Li, Jinsong [3 ]
Wang, Jian [1 ]
Zhuang, Songlin [4 ]
机构：
[1] Hangzhou Dianzi Univ, Elect & Informat Coll, Hangzhou 310018, Peoples R China
[2] China Stand Software Co Ltd, Shanghai 200030, Peoples R China
[3] China Jiliang Univ, Coll Opt & Elect, Hangzhou 310018, Peoples R China
[4] Shanghai Univ Sci & Technol, Shanghai 200093, Peoples R China
来源：
OPTIK | 2011年 / 122卷 / 06期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Focusing properties; Axisymmetric Bessel-modulated Gaussian beam; Vector diffraction theory; CYLINDRICAL-VECTOR BEAMS; ABCD OPTICAL-SYSTEM; FOCAL SHIFT; PROPAGATION; APERTURE;
D O I：
10.1016/j.ijleo.2010.04.005
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Focusing properties of the spirally polarized axisymmetric Bessel-modulated Gaussian beam with quadratic radial dependence (QBG beam) are investigated theoretically by vector diffraction theory. Calculation results show that intensity distribution in focal region can be altered considerably by beam parameter mu and spiral parameter C that indicates polarization spiral degree. For certain real value mu, focal spot can evolve from one focal spot to one focal ring, spherical crust focal shape, then two focal rings on increasing spiral parameter C. It was found that under condition of different mu, evolution principle of focal pattern differs very remarkably on increasing C. And some novel focal shapes may appear, including rhombic shape, quadrangular shape, two-spherical crust focus shape, two-peak shape, one dark hollow focus, two dark hollow focuses pattern, triangle dark hollow focus. (C) 2010 Elsevier GmbH. All rights reserved.
引用
收藏
页码：524 / 528
页数：5
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