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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 20 — Oct. 1, 2007
  • pp: 12995–13002

Plasmonic Bragg reflectors for enhanced extraordinary optical transmission through nano-hole arrays in a gold film

Pramodha Marthandam and Reuven Gordon  »View Author Affiliations

Optics Express, Vol. 15, Issue 20, pp. 12995-13002 (2007)

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We demonstrate the use of plasmonic Bragg reflectors (PBRs) to enhance the extraordinary optical transmission (EOT) from an array of sub-wavelength apertures in a gold film. Arrays of partially milled lines and dimples are placed at the edges of an array of nano-holes in a gold film. These PBR structures, with half the pitch of the array, capture light scattered away from the array by Bragg reflection. By appropriate positioning of the PBR, the light is reflected in-phase with the EOT light and thereby doubles the EOT without shifting the wavelength of the resonant transmission peak. Furthermore, the PBR structures show strong polarization dependence that is also strongly dependent on the structure of the PBR, as explained in terms of scattering of the surface waves.

© 2007 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves

ToC Category:
Optics at Surfaces

Original Manuscript: August 22, 2007
Revised Manuscript: September 23, 2007
Manuscript Accepted: September 23, 2007
Published: September 25, 2007

Reuven Gordon and Pramodha Marthandam, "Plasmonic Bragg reflectors for enhanced extraordinary optical transmission through nano-hole arrays in a gold film," Opt. Express 15, 12995-13002 (2007)

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