物理学报Issue(13)：1-7,7.DOI:10.7498/aps.62.134202
双曲余弦高斯涡旋光束的远场特性研究*
Study on the characteristics of cosh-Gaussian vortex beams in the far field∗
摘要
Abstract
Based on the methods of vector angular spectrum of electromagnetic beams and stationary phase, the analytical expressions of TE and TM terms and energy flux distributions of cosh-Gaussian (ChG) vortex beams in the far field are derived, and used to study the phase singularities and energy flux distributions of the ChG vortex beams. It is shown that the density and position of optical vortices will vary by changing decentered parameter or waist width in the ChG vortex beams. The vortex off-axis distance leads to an asymmetric spatial distribution of energy flux. With gradually increasing vortex off-axis distance, dark spots around the origin will move toward the origin center.关键词
双曲余弦高斯涡旋光束/位相奇点/能流密度Key words
cosh-Gaussian vortex beams/phase singularity/energy flux distribution引用本文复制引用
..双曲余弦高斯涡旋光束的远场特性研究*[J].物理学报,2013,(13):1-7,7.基金项目
四川省教育厅自然科学基金(批准号:10ZB029)资助的课题.* Project supported by the Natural Science Foundation of the Education Department of Sichuan Province, China (Grant No.10ZB029) （批准号:10ZB029）
