Local phase structure of wave dislocation lines: twist and twirl

被引：56

作者：

Dennis, MR ^{[1
]}

机构：

[1] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

来源：

JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS | 2004年 / 6卷 / 05期

关键词：

phase singularity; optical vortex; screw dislocation; topology;

D O I：

10.1088/1464-4258/6/5/011

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Generic wave dislocations (phase singularities, optical vortices) in three dimensions have anisotropic local structure, which is analysed, with emphasis on the twist of surfaces of equal phase along the singular line, and the rotation of the local anisotropy ellipse (twirl). Various measures of twist and twirl are compared in specific examples, and a theorem is found relating the (quantized) topological twist and twirl for a closed dislocation loop with the anisotropy C line index threading the loop.

引用

页码：S202 / S208

页数：7

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