Open AccessElectric and magnetic polarization singularities of focused Gaussian vortex beams in the focal region
Author(s) -
Yu Luo,
Zenghui Gao,
Bihua Tang,
Lü Bai-Da
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.154201
Subject(s) - physics , gravitational singularity , vortex , polarization (electrochemistry) , magnetic field , electric field , cardinal point , gaussian beam , gaussian , optical vortex , transverse plane , radial polarization , optics , classical mechanics , beam (structure) , quantum mechanics , laser beam quality , laser beams , mechanics , laser , chemistry , structural engineering , engineering
Taking the Gaussian vortex beam as an example, the variation of electric and magnetic polarization singularities of focused Gaussian vortex beams is studied. It is shown that in the focal region there exist two- and three-dimensional (2D and 3D) electric and magnetic polarization singularities of focused Gaussian vortex beams, which do not coincide in general. By suitably varying the distance from the focal plane and the truncation parameter, the motion, creation, and annihilation of circular polarization singularities will take place. The critical valuse of the parameters at which a pair of circular polarization singularities of 2D and 3D electric and magnetic fields will annihilate, are not the same. In the 2D electric field the V-point may appear at the focal plane.