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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 3 — Jan. 31, 2011
  • pp: 2626–2633

Light transmission through nanostructured metallic films: coupling between surface waves and localized resonances

L. Lin and A. Roberts  »View Author Affiliations


Optics Express, Vol. 19, Issue 3, pp. 2626-2633 (2011)
http://dx.doi.org/10.1364/OE.19.002626


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Abstract

We present an experimental and computational investigation of the optical properties of thin metallic films periodically perforated with nanometric apertures and show that high transmission through such a structure is attributable to the localized surface plasmon (LSP) resonances of the aperture. The periodicity-related optical phenomena, including Wood’s anomaly and surface plasmon polariton (SPP) excitation, interfere with LSPs and generate Fano resonances with asymmetric spectral profiles. The transmission maximum of the Fano profile is related to the constructive interference between the LSP field and diffracted light propagating along the surface; the transmission minimum of the Fano profile is caused by the destructive interference between LSPs and SPPs. The study confirms the negative role of SPP in transmission through the structure.

© 2011 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: November 29, 2010
Revised Manuscript: January 14, 2011
Manuscript Accepted: January 16, 2011
Published: January 27, 2011

Citation
L. Lin and A. Roberts, "Light transmission through nanostructured metallic films: coupling between surface waves and localized resonances," Opt. Express 19, 2626-2633 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-3-2626


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