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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 9 — Aug. 28, 2012

Enlightening darkness to diffraction limit and beyond: comparison and optimization of different polarizations for dark spot generation

Svetlana N. Khonina and Ilya Golub  »View Author Affiliations


JOSA A, Vol. 29, Issue 7, pp. 1470-1474 (2012)
http://dx.doi.org/10.1364/JOSAA.29.001470


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Abstract

We compare generation of a dark spot using focusing of beams with azimuthal polarizion, radial polarization with a vortex, and a circular polarization with either a first or second order vortex. By optimization of the amplitude-phase pupil, it is ascertained that azimuthal polarization is the most suitable one to obtain the diffraction bounded dark spot per se whose scalar approximation limit has FWHM = 0.29 λ . Consequently, for dark spot generation, this polarization plays the role of the radial polarization in creation of the diffraction-limited bright spot. Using azimuthal polarization, it is shown that an amplitude-phase filter allows generation of a subdiffractive dark spot in a prescribed finite area.

© 2012 Optical Society of America

OCIS Codes
(100.6640) Image processing : Superresolution
(180.0180) Microscopy : Microscopy
(210.0210) Optical data storage : Optical data storage
(260.0260) Physical optics : Physical optics
(260.5430) Physical optics : Polarization
(350.5730) Other areas of optics : Resolution

ToC Category:
Physical Optics

History
Original Manuscript: January 27, 2012
Revised Manuscript: April 9, 2012
Manuscript Accepted: May 3, 2012
Published: June 29, 2012

Virtual Issues
Vol. 7, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Svetlana N. Khonina and Ilya Golub, "Enlightening darkness to diffraction limit and beyond: comparison and optimization of different polarizations for dark spot generation," J. Opt. Soc. Am. A 29, 1470-1474 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-29-7-1470


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