Tightly Focusing of Circularly Polarized Vortex Beams through a Uniaxial Birefringent Crystal |
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Authors: | RAO Lian-Zhou WANG Zong-Chi ZHENG Xiao-Xia |
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Affiliation: | Department of Physics and Electromechanical Engineering, Sanming University, Sanming 365004Library, Sanming University, Sanming 365004 |
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Abstract: | Under the approximation of small birefringence, the properties of circularly polarized vortex beams tightly focused through a uniaxial birefringent crystal are studied. With the proper combination of the topological charge and the birefringence, the small focus, the small bottle beam and the inverse c-shaped intensity profile can be obtained. The effects of the focal shift and the Strehl ratio on the birefringence are analysed. A relation between angular momentum (included spin and orbital) and topological Pancharatnam charge is also presented. |
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Keywords: | 42.25.Lc 42.25.Fx |
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