Polarization singularities in near-field of Gaussian vortex beam diffracted by a circular aperture

doi:10.1088/1674-1056/19/12/124001

Abstract Polarization singularities in the near-field of Gaussian vortex beams diffracted by a circular aperture are studied by a rigorous electromagnetic theory. It is shown that there exist C-points and L-lines, which depend on off-axis displacement parameters along the x and y directions, waist width, wavelength, and topological charge of the diffracted Gaussian vortex beam, as well as on propagation distance. The results are illustrated by numerical calculations.

Keywords: polarization singularities rigorous electromagnetic field theory Gaussian vortex beams

Received: 08 April 2010
Revised: 27 May 2010
Accepted manuscript online:

PACS:	02.60.Lj	(Ordinary and partial differential equations; boundary value problems)
	42.25.Fx	(Diffraction and scattering)
	42.25.Ja	(Polarization)
	42.60.Jf	(Beam characteristics: profile, intensity, and power; spatial pattern formation)

Fund: Project supported by the China Postdoctoral Science Foundation (Grant No. 2009450159), and the Foundation of the State Key Laboratory of Optical Technologies for Micro-Frabrication and Micro-Engineering, Chinese Academy of Sciences (Grant No. KF001).

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Li Jian-Long(李建龙) Polarization singularities in near-field of Gaussian vortex beam diffracted by a circular aperture 2010 Chin. Phys. B 19 124001

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Polarization singularities in near-field of Gaussian vortex beam diffracted by a circular aperture

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