Focal evolution induced by combination of nonspiral and spiral phase plates

作     者：高秀敏 王健 

作者机构：Electronics and Information CollegeHangzhou Dianzi University 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2007年第5卷第5期

页      面：257-259页

核心收录：

学科分类：070207[理学-光学] 0808[工学-电气工程] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：This work was supported by the Science Research Project of Hangzhou Dianzi University (KYS051506021) the National Natural Science Foundation of China (No. 50574035). 

主　　题：Gaussian beams Optical vortices Phase plates Singular optics Spiral phase Vortex beams 

摘      要：Focusing properties of Gaussian beam induced by nonspiral and spiral phase plates are investigated nu-merically. The nonspiral phase plate introduces phase singularity to the incident beam, and the spiral one adjusts the radial phase distribution. Intensity distributions in geometrical focal plane show that the parameters of phase plates can alter the intensity distributions considerably. And local dark focal spots may be obtained, the focal spot may evolve into a circle, a two-peak spot, or a curve line, which indicates that the combination of nonspiral and spiral phase plates can be used to form novel focal spots.