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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 11 — Jun. 1, 2012
  • pp: 2112–2114

Unidirectional and wavelength-selective photonic sphere-array nanoantennas

Yang G. Liu, Wallace C. H. Choy, Wei E. I. Sha, and Weng Cho Chew  »View Author Affiliations

Optics Letters, Vol. 37, Issue 11, pp. 2112-2114 (2012)

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We design a photonic sphere-array nanoantenna (NA) exhibiting both strong directionality and wavelength selectivity. Although the geometric configuration of the photonic NA resembles a plasmonic Yagi–Uda NA, it has different working principles and, most importantly, reduces the inherent metallic loss from plasmonic elements. For any selected optical wavelength, a sharp Fano resonance by the reflector is tunable to overlap spectrally with a wider dipole resonance by the sphere-chain director, leading to high directionality. This Letter provides design principles for directional and selective photonic NAs, which are particularly useful for photon detection and spontaneous emission manipulation.

© 2012 Optical Society of America

OCIS Codes
(290.4210) Scattering : Multiple scattering
(350.5610) Other areas of optics : Radiation
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:

Original Manuscript: December 30, 2011
Revised Manuscript: April 4, 2012
Manuscript Accepted: April 9, 2012
Published: June 1, 2012

Yang G. Liu, Wallace C. H. Choy, Wei E. I. Sha, and Weng Cho Chew, "Unidirectional and wavelength-selective photonic sphere-array nanoantennas," Opt. Lett. 37, 2112-2114 (2012)

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