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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 13 — Jun. 20, 2011
  • pp: 12392–12401

Ultra-wideband optical leaky-wave slot antennas

Yan Wang, Amr S. Helmy, and George V. Eleftheriades  »View Author Affiliations


Optics Express, Vol. 19, Issue 13, pp. 12392-12401 (2011)
http://dx.doi.org/10.1364/OE.19.012392


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Abstract

We propose and investigate an ultra-wideband leaky-wave antenna that operates at optical frequencies for the purpose of efficient energy coupling between localized nanoscale optical circuits and the far-field. The antenna consists of an optically narrow aluminum slot on a silicon substrate. We analyze its far-field radiation pattern in the spectral region centered around 1550nm with a 50% bandwidth ranging from 2000nm to 1200nm. This plasmonic leaky-wave slot produces a maximum far-field radiation angle at 32° and a 3dB beamwidth of 24° at its center wavelength. The radiation pattern is preserved within the 50% bandwidth suffering only insignificant changes in both the radiation angle and the beamwidth. This wide-band performance is quite unique when compared to other optical antenna designs. Furthermore, the antenna effective length for radiating 90% and 99.9% of the input power is only 0.5λ0 and 1.5λ0 respectively at 1550nm. The versatility and simplicity of the proposed design along with its small footprint makes it extremely attractive for integration with nano-optical components using existing technologies.

© 2011 OSA

OCIS Codes
(260.3910) Physical optics : Metal optics
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

History
Original Manuscript: April 19, 2011
Revised Manuscript: May 23, 2011
Manuscript Accepted: May 30, 2011
Published: June 10, 2011

Citation
Yan Wang, Amr S. Helmy, and George V. Eleftheriades, "Ultra-wideband optical leaky-wave slot antennas," Opt. Express 19, 12392-12401 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-13-12392


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