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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 5 — May. 5, 2009

Realization of an evanescent Bessel beam via surface plasmon interference excited by a radially polarized beam

Weibin Chen and Qiwen Zhan  »View Author Affiliations


Optics Letters, Vol. 34, Issue 6, pp. 722-724 (2009)
http://dx.doi.org/10.1364/OL.34.000722


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Abstract

We report the experimental confirmation of the evanescent Bessel beam generation via surface plamson resonance excitation with a radially polarized beam. The interference of surface plasmon waves excited by a radially polarized beam creates an evanescent Bessel beam with enhanced localized field and spot size beyond the diffraction limit. The excitation of the surface plasmon is confirmed by the observation of a narrow dark ring at the back focal plane. Two-dimensional intensity distributions at different distances from the sample surface are mapped by a collection-mode near-field scanning optical microscope to verify the nondiffracting and decaying natures of the evanescent Bessel beam.

© 2009 Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(170.5810) Medical optics and biotechnology : Scanning microscopy
(240.6680) Optics at surfaces : Surface plasmons
(260.5430) Physical optics : Polarization

ToC Category:
Optics at Surfaces

History
Original Manuscript: October 17, 2008
Manuscript Accepted: January 22, 2009
Published: March 3, 2009

Virtual Issues
Vol. 4, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Weibin Chen and Qiwen Zhan, "Realization of an evanescent Bessel beam via surface plasmon interference excited by a radially polarized beam," Opt. Lett. 34, 722-724 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-34-6-722


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References

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