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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 3 — Mar. 18, 2011

Optimization of focusing of linearly polarized light

Svetlana N. Khonina and Ilya Golub  »View Author Affiliations

Optics Letters, Vol. 36, Issue 3, pp. 352-354 (2011)

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We show that, by adding a π-phase shift to one-half of a linearly polarized beam, the roles of the transversal and longitudinal field components of the focused beam are interchanged, resulting in better focusing of the longitudinal component in the direction perpendicular to the phase jump line. For this component the scheme produces a spot with FWHM > 15 % smaller than a spot generated with either linearly or radially polarized light for any NA. The scheme has a similar advantage when applied to circularly polarized light, and it holds for both a plane wave and a realistic case of a Gaussian incident beam. This technique may find applications when using recording media responsive to the longitudinal field only, particularly in read/write for optical storage where the resolution in one transverse dimension is most important.

© 2011 Optical Society of America

OCIS Codes
(100.6640) Image processing : Superresolution
(210.0210) Optical data storage : Optical data storage
(230.0230) Optical devices : Optical devices
(260.0260) Physical optics : Physical optics
(260.5430) Physical optics : Polarization
(350.5730) Other areas of optics : Resolution

ToC Category:
Physical Optics

Original Manuscript: October 19, 2010
Revised Manuscript: December 14, 2010
Manuscript Accepted: December 26, 2010
Published: January 25, 2011

Virtual Issues
Vol. 6, Iss. 3 Virtual Journal for Biomedical Optics

Svetlana N. Khonina and Ilya Golub, "Optimization of focusing of linearly polarized light," Opt. Lett. 36, 352-354 (2011)

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