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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 15 — Jul. 20, 2009
  • pp: 12660–12667

Terahertz transmission properties of an individual slit in a thin metallic plate

J. W. Lee, T. H. Park, Peter Nordlander, and Daniel M. Mittleman  »View Author Affiliations

Optics Express, Vol. 17, Issue 15, pp. 12660-12667 (2009)

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We report on the terahertz transmission properties through a single slit in a thin metallic film. The properties are studied by comparing the transmissions of TE- and TM-polarized electromagnetic waves over a broad spectral range from the geometrical regime to the subwavelength limit. In the geometrical regime, the remarkable terahertz transmission due to guided modes is observed even without the contribution of surface waves. Whereas in the subwavelength limit, the surface charge oscillations associated with the TM-polarized guided mode give rise to strong transmission enhancement. The nature of the mechanisms for the terahertz transmission is elucidated using theoretical simulations of the near-field distributions and electromagnetic energy flow.

© 2009 OSA

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(240.6690) Optics at surfaces : Surface waves
(260.3910) Physical optics : Metal optics
(300.6270) Spectroscopy : Spectroscopy, far infrared
(310.2790) Thin films : Guided waves

ToC Category:
Diffraction and Gratings

Original Manuscript: April 24, 2009
Revised Manuscript: May 26, 2009
Manuscript Accepted: June 17, 2009
Published: July 20, 2009

J. W. Lee, T. H. Park, Peter Nordlander, and Daniel M. Mittleman, "Terahertz transmission properties of an individual slit in a thin metallic plate," Opt. Express 17, 12660-12667 (2009)

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