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

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

中国物理B ›› 2010, Vol. 19 ›› Issue (12): 124001-124001.doi: 10.1088/1674-1056/19/12/124001

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇下一篇

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

李建龙

College of Physical Science and Technology, Sichuan University, Chengdu 610064, China

收稿日期:2010-04-08 修回日期:2010-05-27 出版日期:2010-12-15 发布日期:2010-12-15
基金资助:
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).

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

Received:2010-04-08 Revised:2010-05-27 Online:2010-12-15 Published:2010-12-15
Supported by:
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).

摘要/Abstract

摘要： 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.

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.

Key words: polarization singularities, rigorous electromagnetic field theory, Gaussian vortex beams

中图分类号: (Ordinary and partial differential equations; boundary value problems)

02.60.Lj

42.25.Fx (Diffraction and scattering) 42.25.Ja (Polarization) 42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation)

李建龙. Polarization singularities in near-field of Gaussian vortex beam diffracted by a circular aperture[J]. 中国物理B, 2010, 19(12): 124001-124001.

Li Jian-Long(李建龙). Polarization singularities in near-field of Gaussian vortex beam diffracted by a circular aperture[J]. Chin. Phys. B, 2010, 19(12): 124001-124001.

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

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

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