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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 6 — Jun. 1, 2012
  • pp: 1361–1366

Color-switched directional ultracompact optical nanoantennas

S. H. Alavi Lavasani and Tavakol Pakizeh  »View Author Affiliations


JOSA B, Vol. 29, Issue 6, pp. 1361-1366 (2012)
http://dx.doi.org/10.1364/JOSAB.29.001361


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Abstract

We report on directionality of a novel optical nanoantenna composed of three gold nanodisks ultracompactly arranged in the end-fire configuration. It is found that the emission of a local light source can be remarkably directed and switched based on its color between two opposite directions. The quasi-static approximation is employed to theoretically model the optical properties of the nanostructure and to investigate the observed phenomenon. The proposed nanoantenna enhances and directs the yellow-color toward the forward-direction, and, in contrast, the red-color toward the backward direction. This unique color-switching property is studied in terms of the strong plasmonic interactions of the nanodisks and the resulting hybridized modes of the nanoantenna.

© 2012 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(230.3120) Optical devices : Integrated optics devices
(260.2110) Physical optics : Electromagnetic optics
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optoelectronics

History
Original Manuscript: January 30, 2012
Manuscript Accepted: March 23, 2012
Published: May 22, 2012

Citation
S. H. Alavi Lavasani and Tavakol Pakizeh, "Color-switched directional ultracompact optical nanoantennas," J. Opt. Soc. Am. B 29, 1361-1366 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-6-1361

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