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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 1 — Jan. 1, 2009
  • pp: 16–18

Enhancing extraordinary transmission of light through a metallic nanoslit with a nanocavity antenna

Yanxia Cui and Sailing He  »View Author Affiliations


Optics Letters, Vol. 34, Issue 1, pp. 16-18 (2009)
http://dx.doi.org/10.1364/OL.34.000016


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Abstract

The extraordinary transmission of light through a vertical nanoslit in a metal film is enhanced by introducing a nanocavity antenna formed by a nearby metallic nanostrip over the slit opening. For a fixed wavelength, the width of the metallic nanostrip should be chosen to make the horizontal metal–insulator–metal waveguide of finite length resonant as a Fabry–Perot cavity. When such a cavity antenna is used to enhance the transmission through a nonresonant nanoslit, the slit should be opened at a position with a maximal magnetic field in the horizontal resonant cavity. It is shown that an optimized cavity antenna can enhance greatly the transmission of light through a nonresonant nanoslit (by about 20 times) or a resonant nanoslit (by 124%). Such a transmission enhancement with a nanocavity antenna is studied for the first time, and the physical mechanism is explained.

© 2008 Optical Society of America

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(240.0310) Optics at surfaces : Thin films
(240.6680) Optics at surfaces : Surface plasmons
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: August 22, 2008
Revised Manuscript: October 19, 2008
Manuscript Accepted: November 14, 2008
Published: December 19, 2008

Citation
Yanxia Cui and Sailing He, "Enhancing extraordinary transmission of light through a metallic nanoslit with a nanocavity antenna," Opt. Lett. 34, 16-18 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-1-16


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