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Chin. Phys. B, 2010, Vol. 19(12): 124001    DOI: 10.1088/1674-1056/19/12/124001

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

Li Jian-Long(李建龙)
College of Physical Science and Technology, Sichuan University, Chengdu 610064, China
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).

Cite this article: 

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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