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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 17 — Aug. 17, 2009
  • pp: 15216–15227

Tightly coupled tripole conductor pairs as constituents for a planar 2D-isotropic negative refractive index metamaterial

Andrea Vallecchi and Filippo Capolino  »View Author Affiliations

Optics Express, Vol. 17, Issue 17, pp. 15216-15227 (2009)

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A metamaterial, arranged by stacking layers of planar constituents suitably shaped to be responsive to arbitrarily linearly polarized incident waves is here shown to exhibit 2D-isotropic effective negative refractive index (NRI). The general concept underlying this metamaterial design consists of closely pairing two metallic particles to accomplish, as a result of their tight coupling, both symmetric and antisymmetric resonance modes, whose proper superposition can lead to an effective negative refraction response. The proposed structure is composed by layers of periodically arranged pairs of face coupled loaded tripoles printed on the opposite sides of a single dielectric substrate. Through a comprehensive characterization of the transmission properties of such metamaterial, together with the analysis of its dispersion diagram, conclusive evidence that the medium exhibits effective NRI properties as well as good impedance matching to free space is provided. We also describe some guidelines to design the proposed metamaterial with a prescribed operational frequency bandwidth, dependently on the structure parameters.

© 2009 OSA

OCIS Codes
(160.4670) Materials : Optical materials
(230.3990) Optical devices : Micro-optical devices
(260.5740) Physical optics : Resonance

ToC Category:

Original Manuscript: April 30, 2009
Revised Manuscript: July 2, 2009
Manuscript Accepted: July 8, 2009
Published: August 13, 2009

Andrea Vallecchi and Filippo Capolino, "Tightly coupled tripole conductor pairs as constituents for a planar 2D-isotropic negative refractive index metamaterial," Opt. Express 17, 15216-15227 (2009)

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