The focusing properties of circularly polarized vortex beam are studied numerically. With proper combination of the handness of the circular polarization and vortex charge, focal field with an extremely strong longitudinal component can be obtained.
© 2005 Optical Society of America
Q. Zhan, "Focusing Properties of Circularly Polarized Vortex Beam," in Frontiers in Optics, OSA Technical Digest Series (Optical Society of America, 2005), paper FWT5.
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