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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 26 — Dec. 21, 2009
  • pp: 23992–24001

Light trapping cavity enhanced light transmission through a single sub-wavelength aperture in a metal film

Juuso Olkkonen  »View Author Affiliations

Optics Express, Vol. 17, Issue 26, pp. 23992-24001 (2009)

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We demonstrate that optical transmission of a normally incident, monochromatic plane wave through a single sub-wavelength aperture in an opaque metal film can be substantially enhanced by a thin, semitransparent metal film placed parallel to the opaque metal film in front of the aperture. When the semi-transparent and the opaque metal film are separated by a proper distance, a light trapping cavity is formed and the sub-wavelength aperture exhibits a transmission maximum. An enhancement factor of ~40 is demonstrated for a cylindrical 100 nm diameter hole in a silver film.

© 2009 OSA

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(240.0240) Optics at surfaces : Optics at surfaces

ToC Category:
Diffraction and Gratings

Original Manuscript: October 9, 2009
Revised Manuscript: November 25, 2009
Manuscript Accepted: December 2, 2009
Published: December 16, 2009

Juuso Olkkonen, "Light trapping cavity enhanced light transmission through a single sub-wavelength aperture in a metal film," Opt. Express 17, 23992-24001 (2009)

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