Interaction of two edge dislocations in free-space propagation

被引：0

作者：

何德 ^{[1
,2
]}

高曾辉 ^{[1
]}

闫红卫 ^{[2
]}

吕百达 ^{[2
]}

机构：

[1] Key Laboratory of Computational Physics,Yibin University

[2] Institute of Laser Physics and Chemistry,Sichuan University

来源：

Chinese Physics B | 2011年 / 01期

基金：

中国国家自然科学基金;

关键词：

edge dislocation interaction; optical vortex; free-space propagation;

D O I：

暂无

中图分类号：

O436 [物理光学（波动光学）];

学科分类号：

070207 ; 0803 ;

摘要：

This paper studies in detail the interaction of two edge dislocations nested in a Gaussian beam propagating in free space.It shows that in free-space propagation the edge dislocations are unstable and vanish,and two noncanonical vortices with opposite topological charge take place when off-axis distances c 1 and c 2 of two edge dislocations are nonzero,and the condition k 2 w 8 0 + 32c 1 c 2 (w 2 0 2c 1 c 2)z 2 > 0 is fulfilled (k-wave number,w 0-waist width).A noncanonical vortex appears when one off-axis distance is zero.However,one edge dislocation is stable when two edge dislocations are perpendicular and one off-axis distance is zero.Two perpendicular edge dislocations both with zero off-axis distance are also stable.The analytical results are illustrated by numerical examples.

引用

页码：356 / 361

页数：6

共 22 条

[1] Interaction of two edge dislocations in free-space propagation
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