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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 16 — Jul. 30, 2012
  • pp: 18238–18247

Experimental verification of spoof surface plasmons in wire metamaterials

Yujiro Kushiyama, Takuji Arima, and Toru Uno  »View Author Affiliations

Optics Express, Vol. 20, Issue 16, pp. 18238-18247 (2012)

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In this paper, we experimentally demonstrate the excitation of spoof surface plasmon polaritons (SPPs) on a wire-medium metamaterial slab in the microwave region. The spoof SPPs are excited on the opposite side of the slab from the source, which is desirable for applications such as sensing devices. Using the prism coupling method, we verify the excitation of spoof SPPs by measuring the reflection spectrum and near-field enhancement. The excitation of spoof SPPs is also verified by using the grating coupling method, where we demonstrate transmission enhancement through the metamaterial slab by placing diffraction gratings on both sides of the slab. Numerical investigation shows that the enhanced transmission can be attributed to the dispersion relations of the spoof SPPs and the periodicity of the diffraction grating. These properties can be used to realize extraordinary transmission and directional beaming.

© 2012 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(160.1245) Materials : Artificially engineered materials
(160.3918) Materials : Metamaterials
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:

Original Manuscript: April 11, 2012
Revised Manuscript: July 14, 2012
Manuscript Accepted: July 15, 2012
Published: July 25, 2012

Yujiro Kushiyama, Takuji Arima, and Toru Uno, "Experimental verification of spoof surface plasmons in wire metamaterials," Opt. Express 20, 18238-18247 (2012)

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