Propagation of a Pearcey-Gaussian-vortex beam in free space and Kerr media

被引：23
作者：
Peng, Yulian [1 ]
Chen, Chidao [1 ]
Chen, Bo [1 ]
Peng, Xi [1 ]
Zhou, Meiling [1 ]
Zhang, Liping [1 ]
Li, Dongdong [1 ]
Deng, Dongmei [1 ,2 ]
机构：
[1] South China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510631, Guangdong, Peoples R China
[2] Univ Sci & Technol China, Chinese Acad Sci, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China
来源：
LASER PHYSICS | 2016年 / 26卷 / 12期
基金：
中国国家自然科学基金;
关键词：
in free space and Kerr media; the intensity singularity and the phase singularity; a bright speck; optical vortex; numerical experiment; ANGULAR-MOMENTUM; DYNAMICS; VECTOR; SCALAR;
D O I：
10.1088/1054-660X/26/12/125401
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The propagation of a Pearcey-Gaussian-vortex beam (PGVB) has been investigated numerically in free space and Kerr media. In addition, we have done a numerical experiment for the beam in free space. A PGVB maintains the characteristics of auto-focusing, selfhealing and form-invariance which are possessed by a Pearcey beam and a Pearcey-Gaussian beam. Due to the influence of the optical vortex, a bright speck occurs in front of the main lobe. Compared with a Pearcey beam and a Pearcey-Gaussian beam, a PGVB has the most remarkable intensity singularity and the phase singularity. It is worth noting that the impact of the vortex at the coordinate origins means that a PGVB in the vicinity carries no angular momentum or transverse energy flow. We have investigated and numerically simulated the transverse intensity of a PGVB in Kerr media. We find that the auto-focusing of a PGVB in a Kerr medium becomes stronger with increasing power.
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页数：7
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