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Tightly Focusing of Circularly Polarized Vortex Beams through a Uniaxial Birefringent Crystal |
| RAO Lian-Zhou1, WANG Zong-Chi1, ZHENG Xiao-Xia2 |
| 1Department of Physics and Electromechanical Engineering, Sanming University, Sanming 3650042Library, Sanming University, Sanming 365004 |
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| Cite this article: |
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RAO Lian-Zhou, WANG Zong-Chi, ZHENG Xiao-Xia 2008 Chin. Phys. Lett. 25 3223-3226 |
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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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Received: 15 March 2008
Published: 29 August 2008
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