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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 19 — Sep. 18, 2006
  • pp: 8827–8836

On the reinterpretation of resonances in split-ring-resonators at normal incidence

Carsten Rockstuhl, Falk Lederer, Christoph Etrich, Thomas Zentgraf, Jürgen Kuhl, and Harald Giessen  »View Author Affiliations


Optics Express, Vol. 14, Issue 19, pp. 8827-8836 (2006)
http://dx.doi.org/10.1364/OE.14.008827


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Abstract

We numerically study the spectral response of ‘U’-shaped split-ring-resonators at normal incidence with respect to the resonator plane. Based on the evaluation of the near-field patterns of the resonances and their geometry-dependent spectral positions, we obtain a comprehensive and consistent picture of their origin. We conclude that all resonances can be understood as plasmonic resonances of increasing order of the entire structure. In particular, for an electrical field polarized parallel to the gap the so-called LC-resonance corresponds to the fundamental plasmonic mode and, contrary to earlier interpretations, the electrical resonance is a second order plasmon mode of the entire structure. The presence of further higher order modes is discussed.

© 2006 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics
(260.5740) Physical optics : Resonance

ToC Category:
Metamaterials

History
Original Manuscript: June 30, 2006
Manuscript Accepted: August 2, 2006
Published: September 18, 2006

Citation
Carsten Rockstuhl, Falk Lederer, Christoph Etrich, Thomas Zentgraf, Jürgen Kuhl, and Harald Giessen, "On the reinterpretation of resonances in split-ring-resonators at normal incidence," Opt. Express 14, 8827-8836 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-19-8827


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