Tightly Focusing of Circularly Polarized Vortex Beams through a Uniaxial Birefringent Crystal  

作　　者：饶连周 王宗篪 郑晓霞 

机构地区：[1]Department of Physics and Electromechanical Engineering, Sanming University, Sanming 365004 [2]Library, Sanming University, Sanming 365004

出　　处：《Chinese Physics Letters》2008年第9期3223-3226,共4页中国物理快报（英文版）

基　　金：Supported by the Natural Science Foundation of the Education Bureau of Fujian Province under Grant No JA06048, and the Natural Science Foundation of Sanming University under Grant No B0603/G.

摘　　要：Under the approximation of small birefringence, the properties of circularly polarized vortex beams tightly focused through a uniaxial birefringent crystal are studied. With the proper combination of the topological charge and the birefringence, the small focus, the small bottle beam and the inverse c-shaped intensity profile can be obtained. The effects of the focal shift and the Strehl ratio on the birefringence are analysed. A relation between angular momentum （included spin and orbital） and topological Pancharatnam charge is also presented.Under the approximation of small birefringence, the properties of circularly polarized vortex beams tightly focused through a uniaxial birefringent crystal are studied. With the proper combination of the topological charge and the birefringence, the small focus, the small bottle beam and the inverse c-shaped intensity profile can be obtained. The effects of the focal shift and the Strehl ratio on the birefringence are analysed. A relation between angular momentum （included spin and orbital） and topological Pancharatnam charge is also presented.

关 键 词：the power-law exponents PRECIPITATION durative abrupt precipitation change 

分 类 号：O734[理学—晶体学]