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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. 6, Iss. 7 — Jul. 27, 2011

Tight focusing of a double-ring-shaped, azimuthally polarized beam

Bo Tian and Jixiong Pu  »View Author Affiliations


Optics Letters, Vol. 36, Issue 11, pp. 2014-2016 (2011)
http://dx.doi.org/10.1364/OL.36.002014


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Abstract

We study the focusing properties of a double-ring-shaped azimuthally polarized beam through an annular high NA objective lens. It is shown that a subwavelength focal hole ( 0.5 λ ) with a quite long depth of focus ( 26 λ ) is achieved near the focus. This kind of nondiffracting focal hole is called dark channel, which may have applications in atom optical experiments, such as with atomic lenses, atom traps, and atom switches.

© 2011 Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(080.3630) Geometric optics : Lenses
(260.5430) Physical optics : Polarization

ToC Category:
Diffraction and Gratings

History
Original Manuscript: February 24, 2011
Revised Manuscript: April 19, 2011
Manuscript Accepted: April 26, 2011
Published: May 26, 2011

Virtual Issues
Vol. 6, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Bo Tian and Jixiong Pu, "Tight focusing of a double-ring-shaped, azimuthally polarized beam," Opt. Lett. 36, 2014-2016 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-36-11-2014

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