We experimentally demonstrate that a radially polarized beam can be focused to a spot size significantly smaller than for linear polarization and that the longitudinal field component arising at focus best coupled to small particles.
© 2004 Optical Society of America
(220.0220) Optical design and fabrication : Optical design and fabrication
(220.2560) Optical design and fabrication : Propagating methods
(260.0260) Physical optics : Physical optics
(260.5430) Physical optics : Polarization
S. Quabis, R. Dorn, J. Müller, G. K. Rurimo, and G. Leuchs, "Radial polarization minimizes focal spot size," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2004), paper IWG3.