Journal
OPTICS LETTERS
Volume 31, Issue 7, Pages 867-869Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.31.000867
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The properties of circularly polarized vortex beams in cylindrical polarization bases are studied. A circularly polarized vortex beam is decomposed into radial and azimuthal polarization. With the proper combination of vortex charge and the handedness of the circular polarization, a focal field with an extremely strong longitudinal component as well as a flat-topped profile can be obtained. The cylindrical decomposition also sheds light on the connections between orbital angular momentum and the spin of the light beams. (c) 2006 Optical Society of America.
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