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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 5 — Feb. 27, 2012
  • pp: 5168–5177

Dispersion relation and radiation properties of plasmonic crystals with triangular lattices

Takayuki Okamoto and Satoshi Kawata  »View Author Affiliations

Optics Express, Vol. 20, Issue 5, pp. 5168-5177 (2012)

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The optical properties of plasmonic crystals consisting of triangular lattices are theoretically investigated using rigorous coupled-wave analysis. Two types of structures were analyzed, one composed of an array of short cylindrical pillars on a flat metal surface and the other composed of an array of shallow cylindrical holes formed in a flat metal surface. The dispersion relations and radiation properties of the second and the third bands around the Γ point in the first Brillouin zone were investigated. We found these properties to be highly dependent on the radii of the cylindrical pillars and holes relative to the lattice constant. We also examined the influence on the dispersion relations and radiation properties of the deviation of the cross-section of the pillars and holes from a perfect circle.

© 2012 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(050.5298) Diffraction and gratings : Photonic crystals
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: November 23, 2011
Revised Manuscript: December 27, 2011
Manuscript Accepted: January 25, 2012
Published: February 16, 2012

Takayuki Okamoto and Satoshi Kawata, "Dispersion relation and radiation properties of plasmonic crystals with triangular lattices," Opt. Express 20, 5168-5177 (2012)

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