An asymmetric optical vortex generated by a spiral refractive plate

被引：17

作者：

Kotlyar, V. V. ^{[1
]}

Kovalev, A. A. ^{[1
]}

Stafeev, S. S. ^{[1
]}

Nalimov, A. G. ^{[1
]}

机构：

[1] Russian Acad Sci, Image Proc Syst Inst, Laser Measurements Lab, Samara 443001, Russia

来源：

JOURNAL OF OPTICS | 2013年 / 15卷 / 02期

关键词：

refractive spiral phase plate; optical vortex; thin element; transmittance function; microrelief; Huygens-Fresnel principle; ORBITAL ANGULAR-MOMENTUM; PHASE PLATES; GAUSSIAN-BEAM; PLANE; SINGULARITIES; DIFFRACTION; WAVE;

D O I：

10.1088/2040-8978/15/2/025712

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Using a revised Kirchhoff diffraction integral and the finite-difference time-domain method we show that an optical vortex generated by a refractive spiral plate with a relief step has an asymmetric profile. The annular diffraction pattern in the optical vortex beam cross-section is found to be disturbed not only for near-field diffraction but also for the Fresnel zone. For a spiral phase plate with topological charge 3, fabricated on a resist, optical vortex asymmetry has been shown experimentally by near-field scanning optical microscopy.

引用

页数：8

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