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Optics Letters

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  • Vol. 36, Iss. 11 — Jun. 1, 2011
  • pp: 2146–2148

Directional far-field response of a spherical nanoantenna

Yang G. Liu, Yan Li, and Wei E. I. Sha  »View Author Affiliations


Optics Letters, Vol. 36, Issue 11, pp. 2146-2148 (2011)
http://dx.doi.org/10.1364/OL.36.002146


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Abstract

We study the directional far-field response of a spherical nanoantenna via engineering the plasmonic nanosphere’s distance, size, and material. A unified pattern synthesis approach based on the T-matrix method and the particle swarm optimization is proposed for the directional beamforming of the nanoantenna. The angular response of the directional nanoantenna is very sensitive to the material change but is immunized to the random error of the spatial position of each particle. The physical origin of the high directionality is attributed to the coherent near-field distribution with large correlation length. This work provides the fundamental theory and physics for future nanoantenna design.

© 2011 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(350.5030) Other areas of optics : Phase
(350.5610) Other areas of optics : Radiation
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Coherence and Statistical Optics

History
Original Manuscript: April 12, 2011
Manuscript Accepted: May 3, 2011
Published: June 1, 2011

Citation
Yang G. Liu, Yan Li, and Wei E. I. Sha, "Directional far-field response of a spherical nanoantenna," Opt. Lett. 36, 2146-2148 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-11-2146

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