Open AccessThe electric and magnetic polarization singularities of Gaussian vortex beam in the free-space propagation
Author(s) -
Yu Luo,
Lü Bai-Da,
Bihua Tang,
Yinian Zhu
Publication year - 2012
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.61.134202
Subject(s) - physics , vortex , gravitational singularity , polarization (electrochemistry) , magnetic field , free space , gaussian beam , polarization density , electric field , beam (structure) , classical mechanics , optics , quantum mechanics , mechanics , magnetization , chemistry
Using the Fresnel vector diffraction integral and taking the Gaussian vortex beam as an example, the analytical expressions for the electric and magnetic components of Gaussian vortex beam propagating in the free-space are derived, and used to study the variations of electric and magnetic polarization singularities in free space. It is found that there exist two-dimensional (2D) and three-dimensional (3D) electric and magnetic polarization singularities in the free-space, which do not coincide in general. By varying waist width ratio, amplitude ratio, and propagation distance, the motion of polarization singularities takes place. In the 2D and the 3D electric and magnetic fields, the V-point may appear under a certain condition.