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
李建龙
Li Jian-Long(李建龙)†
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.
中图分类号: (Ordinary and partial differential equations; boundary value problems)