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Formation of Small Bottle Light Beams |
| RAO Lian-Zhou1; PU Ji-Xiong2 |
| 1Department of Physics and Electromechanical Engineering, Sanming University, Sanming 3650042Department of Electronic Science and Technology, Huaqiao University, Quanzhou 362021 |
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| Cite this article: |
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RAO Lian-Zhou, PU Ji-Xiong 2007 Chin. Phys. Lett. 24 3412-3415 |
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Abstract A method for obtaining small bottle light beams, e.g. 0.92λ×0.4λ, in a high numerical-aperture lens system is proposed and numerically demonstrated. This can be achieved by changing the radius of each zone of the binary element and polarization rotation angle of the cylindrically polarized vectorial vortex beam. It is found that the transversal and axial sizes of this bottle beam are equal to about 0.92λ and 0.4λ, respectively. In addition, the connection between angular momentum and topological Pancharatnam charge is also shown.
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| Keywords:
42.25.Fx
42.25.Ja
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Received: 10 September 2007
Published: 03 December 2007
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