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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 21 — Oct. 13, 2008
  • pp: 16529–16537

Spectral properties of plasmonic resonator antennas

Edward S. Barnard, Justin S. White, Anu Chandran, and Mark L. Brongersma  »View Author Affiliations

Optics Express, Vol. 16, Issue 21, pp. 16529-16537 (2008)

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A theoretical study of the optical properties of metallic nano-strip antennas is presented. Such strips exhibit retardation-based resonances resulting from the constructive interference of counter propagating short-range surface plasmon-polaritons (SR-SPPs) that reflect from the antenna terminations. A Fabry-Pérot model was formulated that successfully predicts both the peak position and spectral shape of their optical resonances. This model requires knowledge of the SR-SPP reflection amplitude and phase pickup upon reflection from the structure terminations. These quantities were first estimated using an intuitive Fresnel reflection model and then calculated exactly using full-field simulations based on the finite-difference frequency-domain (FDFD) method. With only three dimensionless scaling parameters, the Fabry-Pérot model provides simple design rules for engineering resonant properties of such plasmonic resonator antennas.

© 2008 Optical Society of America

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(140.4780) Lasers and laser optics : Optical resonators
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics

ToC Category:
Optics at Surfaces

Original Manuscript: September 16, 2008
Revised Manuscript: September 26, 2008
Manuscript Accepted: September 28, 2008
Published: October 1, 2008

Edward S. Barnard, Justin S. White, Anu Chandran, and Mark L. Brongersma, "Spectral properties of plasmonic resonator antennas," Opt. Express 16, 16529-16537 (2008)

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