FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Spatial Correlation Properties of Tightly Focused J0-Correlated Azimuthally Polarized Vortex Beams |
RAO Lian-Zhou**, LIN Hui-Chuan, SUN Qing-Quan |
College of Electromechanical Engineering, Sanming University, Sanming 365004
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Cite this article: |
RAO Lian-Zhou, LIN Hui-Chuan, SUN Qing-Quan 2013 Chin. Phys. Lett. 30 054211 |
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Abstract Based on vectorial Debye diffraction theory, the spatial correlation properties in the focal region of a J0 -correlated azimuthally polarized vortex beam through a high numerical aperture (NA) are analyzed. The expressions for a pair of points on the axis of symmetry and for a pair of points in the focal plane are derived. It is found that the longitudinal and transverse coherence lengths in the focal region change with the variation in the topological charge and coherence parameter of the vortex field, together with the NA values. In addition, the degree of coherence is shown to possess phase singularities.
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Received: 10 January 2013
Published: 31 May 2013
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