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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 6 — Mar. 15, 2006
  • pp: 820–822

Focusing property of a double-ring-shaped radially polarized beam

Yuichi Kozawa and Shunichi Sato  »View Author Affiliations


Optics Letters, Vol. 31, Issue 6, pp. 820-822 (2006)
http://dx.doi.org/10.1364/OL.31.000820


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Abstract

The intensity distributions of a tightly focused radially polarized beam that has a double-ring-shaped transverse mode pattern were calculated based on vector diffraction theory. The distribution of the longitudinal component near the focus varied drastically with the degree of truncation of the incident beam by a pupil. When the ratio of the pupil radius to the beam radius was 1.3 , the longitudinal component disappeared at the focal point, owing to destructive interference. This dark area surrounded by an intense light field was of the order of the wavelength, with excellent intensity symmetry.

© 2006 Optical Society of America

OCIS Codes
(110.2990) Imaging systems : Image formation theory
(140.3300) Lasers and laser optics : Laser beam shaping
(260.3160) Physical optics : Interference
(260.5430) Physical optics : Polarization

ToC Category:
Physical Optics

History
Original Manuscript: November 21, 2005
Revised Manuscript: December 7, 2005
Manuscript Accepted: December 12, 2005

Citation
Yuichi Kozawa and Shunichi Sato, "Focusing property of a double-ring-shaped radially polarized beam," Opt. Lett. 31, 820-822 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-6-820


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