文献类型：期刊文献

英文题名：Propagation Property of an Astigmatic sin-Gaussian Beam in a Strongly Nonlocal Nonlinear Media

作者：Zhu, Kaicheng Zhu, Jie Su, Qin Tang, Huiqin

第一作者：Zhu, Kaicheng

通信作者：Zhu, J[1]|[14440901970e7c97ae94b]朱洁;

机构：[1]Guangzhou Coll Technol & Business, Dept Elect & Informat Engn, Guangzhou 510850, Guangdong, Peoples R China;[2]Guizhou Inst Technol, Coll Sci, Guiyang 550003, Guizhou, Peoples R China;[3]Cent South Univ, Sch Phys & Elect, Changsha 410083, Hunan, Peoples R China

第一机构：Guangzhou Coll Technol & Business, Dept Elect & Informat Engn, Guangzhou 510850, Guangdong, Peoples R China

通信机构：corresponding author), Guizhou Inst Technol, Coll Sci, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院理学院;贵州理工学院;

年份：2019

卷号：9

期号：1

外文期刊名：APPLIED SCIENCES-BASEL

收录：;Scopus(收录号：2-s2.0-85059170790);WOS:【SCI-EXPANDED(收录号:WOS:000456579300071)】；

基金：This research is supported by the high level introduction of talent research start-up fund of Guizhou Institute of Technology, China. Many thanks to the anonymous reviewers for their good suggestions.

语种：英文

外文关键词：nonlocal nonlinear medium; astigmatic sin-Gaussian beam; screw dislocation; edge dislocation; vortex

摘要：Based on the Snyder and Mitchell model, a closed-form propagation expression of astigmatic sin-Gaussian beams through strongly nonlocal nonlinear media (SNNM) is derived. The evolutions of the intensity distributions and the corresponding wave front dislocations are discussed analytically and numerically. It is generally proved that the light field distribution varies periodically with the propagation distance. Furthermore, it is demonstrated that the astigmatism and edge dislocation nested in the initial sin-Gaussian beams greatly influence the pattern configurations and phase singularities during propagation. In particular, it is found that, when the beam parameters are properly selected, a vortex beam with perfect doughnut-shaped profile can be obtained for astigmatic sin-Gaussian beams with two-lobe pattern propagating in SNNM.