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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 31, Iss. 2 — Feb. 1, 2014
  • pp: 373–378

Tight focusing of quasi-cylindrically polarized beams

Zhongsheng Man, Changjun Min, Siwei Zhu, and X.-C. Yuan  »View Author Affiliations


JOSA A, Vol. 31, Issue 2, pp. 373-378 (2014)
http://dx.doi.org/10.1364/JOSAA.31.000373


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Abstract

Based on vectorial diffraction theory, tight focusing properties of quasi-cylindrical polarized beams (QCPBs) composed of equal fan-shaped sectors with linear polarization are investigated. We find that, for quasi-radially polarized illumination, a weak azimuthal component emerges and the circular symmetry of focus is traded in when the total number of sector N is small, but when N8 it is approaching that of a perfect radially polarized beam with a deviation smaller than 5.3% and a ratio of maximum total intensity larger than 95.5%. Meanwhile, for quasi-azimuthal polarized illumination, although weak radial and longitudinal components emerge, it is also close to that of the perfect azimuthally polarized beam when N8 with deviation smaller than 5.3% and a ratio larger than 95.0%. These results not only reveal a deep understanding of the focusing properties of QCPBs, but also provide an important contribution toward optimization of the monolithic methods for generating vector beams.

© 2014 Optical Society of America

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

ToC Category:
Physical Optics

History
Original Manuscript: September 24, 2013
Revised Manuscript: December 12, 2013
Manuscript Accepted: December 19, 2013
Published: January 23, 2014

Citation
Zhongsheng Man, Changjun Min, Siwei Zhu, and X.-C. Yuan, "Tight focusing of quasi-cylindrically polarized beams," J. Opt. Soc. Am. A 31, 373-378 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-2-373

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