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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 16 — Jul. 30, 2012
  • pp: 17916–17927

Response of plasmonic resonant nanorods: an analytical approach to optical antennas

Radek Kalousek, Petr Dub, Lukáš Břínek, and Tomáš Šikola  »View Author Affiliations

Optics Express, Vol. 20, Issue 16, pp. 17916-17927 (2012)

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An analytical model of the response of a free-electron gas within the nanorod to the incident electromagnetic wave is developed to investigate the optical antenna problem. Examining longitudinal oscillations of the free-electron gas along the antenna nanorod a simple formula for antenna resonance wavelengths proving a linear scaling is derived. Then the nanorod polarizability and scattered fields are evaluated. Particularly, the near-field amplitudes are expressed in a closed analytical form and the shift between near-field and far-field intensity peaks is deduced.

© 2012 OSA

OCIS Codes
(260.5740) Physical optics : Resonance
(250.5403) Optoelectronics : Plasmonics
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Optics at Surfaces

Original Manuscript: June 8, 2012
Revised Manuscript: July 13, 2012
Manuscript Accepted: July 16, 2012
Published: July 20, 2012

Radek Kalousek, Petr Dub, Lukáš Břínek, and Tomáš Šikola, "Response of plasmonic resonant nanorods: an analytical approach to optical antennas," Opt. Express 20, 17916-17927 (2012)

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