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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 13 — Jun. 22, 2009
  • pp: 11026–11038

Dependence of resonant light transmission properties of a subwavelength slit on structural parameters

K. Lindfors, L. Lechner, and M. Kaivola  »View Author Affiliations

Optics Express, Vol. 17, Issue 13, pp. 11026-11038 (2009)

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We perform a systematic study of the resonant transmission of visible and near-infrared (NIR) light through a single subwavelength slit in a gold film when the parameters defining the structure are varied. We further examine the optical properties of a related nanostructure, a cross with subwavelength sized features. Focused ion beam (FIB) milling was used to fabricate nanoslits and crosses with linewidths ranging from 26 nm to 85 nm. The dimensions of the structure are found to affect strongly the transmittance spectrum. For example, as the slit becomes narrower the resonance is observed to both sharpen and shift significantly. Our observations are in good agreement with our earlier numerical calculations on the optical properties of nanoslits.

© 2009 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Diffraction and Gratings

Original Manuscript: April 23, 2009
Revised Manuscript: June 5, 2009
Manuscript Accepted: June 7, 2009
Published: June 17, 2009

K. Lindfors, L. Lechner, and M. Kaivola, "Dependence of resonant light transmission properties of a subwavelength slit on structural parameters," Opt. Express 17, 11026-11038 (2009)

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