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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 30, Iss. 8 — Aug. 1, 2013
  • pp: 1646–1653

Electric and magnetic polarization singularities of first-order Laguerre–Gaussian beams diffracted at a half-plane screen

Yamei Luo, Zenghui Gao, Bihua Tang, and Baida Lü  »View Author Affiliations


JOSA A, Vol. 30, Issue 8, pp. 1646-1653 (2013)
http://dx.doi.org/10.1364/JOSAA.30.001646


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Abstract

Based on the vector Fresnel diffraction integrals, analytical expressions for the electric and magnetic components of first-order Laguerre–Gaussian beams diffracted at a half-plane screen are derived and used to study the electric and magnetic polarization singularities in the diffraction field for both two- and three-dimensional (2D and 3D) cases. It is shown that there exist 2D and 3D electric and magnetic polarization singularities in the diffraction field, which do not coincide each other in general. By suitably varying the waist width ratio, off-axis displacement parameter, amplitude ratio, or propagation distance, the motion, pair-creation, and annihilation of circular polarization singularities, and the motion of linear polarization singularities take place in 2D and 3D electric and magnetic fields. The V point, at which two circular polarization singularities with the same topological charge but opposite handedness collide, appears in the 2D electric field under certain conditions in the diffraction field and free-space propagation. A comparison with the free-space propagation is also made.

© 2013 Optical Society of America

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(260.5430) Physical optics : Polarization
(260.6042) Physical optics : Singular optics

ToC Category:
Physical Optics

History
Original Manuscript: June 3, 2013
Revised Manuscript: July 1, 2013
Manuscript Accepted: July 1, 2013
Published: July 24, 2013

Citation
Yamei Luo, Zenghui Gao, Bihua Tang, and Baida Lü, "Electric and magnetic polarization singularities of first-order Laguerre–Gaussian beams diffracted at a half-plane screen," J. Opt. Soc. Am. A 30, 1646-1653 (2013)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-30-8-1646


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