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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 1, Iss. 3 — Jul. 1, 2011
  • pp: 480–488

Substrate and aspect-ratio effects in resonant nanoaperture arrays

A. Roberts and L. Lin  »View Author Affiliations


Optical Materials Express, Vol. 1, Issue 3, pp. 480-488 (2011)
http://dx.doi.org/10.1364/OME.1.000480


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Abstract

Here we discuss the influence of a substrate on transmission through subwavelength holes in metallic films. In particular, we show that in the case of transmission maxima associated with localized resonances of the apertures, that the wavelength at which this maximum occurs are strongly influenced by the presence of a substrate and the aspect ratio of the structure. Furthermore, we show that removing a shallow region of the substrate immediately below the apertures leads to blue-shifting of the resonance and increased transmission compared to that in the presence of a homogeneous substrate.

© 2011 OSA

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(160.3918) Materials : Metamaterials
(160.4236) Materials : Nanomaterials
(250.5403) Optoelectronics : Plasmonics
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Metamaterials

History
Original Manuscript: May 10, 2011
Revised Manuscript: June 23, 2011
Manuscript Accepted: June 23, 2011
Published: June 29, 2011

Citation
A. Roberts and L. Lin, "Substrate and aspect-ratio effects in resonant nanoaperture arrays," Opt. Mater. Express 1, 480-488 (2011)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-1-3-480


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