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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 25 — Dec. 7, 2009
  • pp: 22726–22734

Modulation of evanescent focus by localized surface plasmons waveguide

Xingyu Gao and Xiaosong Gan  »View Author Affiliations


Optics Express, Vol. 17, Issue 25, pp. 22726-22734 (2009)
http://dx.doi.org/10.1364/OE.17.022726


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Abstract

In this paper, we present the modulation of a tightly focused evanescent field by a nano-plasmonic waveguide, which consists of two silver nanorods lying on the interface of two dielectric media. Linearly polarized and radially polarized illuminating beams are investigated under the influence of localized surface plasmons effect. It is demonstrated that different polarization components of the tightly focused evanescent field can be modulated accordingly. The results obtained from the finite difference time domain simulation show that super-resolved focal spot can be achieved using the nano-plasmonic waveguide structure.

© 2009 OSA

ToC Category:
Optics at Surfaces

History
Original Manuscript: July 16, 2009
Revised Manuscript: November 3, 2009
Manuscript Accepted: November 5, 2009
Published: November 30, 2009

Citation
Xingyu Gao and Xiaosong Gan, "Modulation of evanescent focus by localized surface plasmons waveguide," Opt. Express 17, 22726-22734 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-25-22726


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