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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 8, Iss. 12 — Dec. 10, 2010
  • pp: 1117–1119

Enhanced optical transmission through a nanoslit by coupling light between periodic strips and metal film

Huajun Zhao and Dairong Yuan  »View Author Affiliations

Chinese Optics Letters, Vol. 8, Issue 12, pp. 1117-1119 (2010)

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Surface plasmon resonance (SPR) is obtained by exciting the surface plasmon (SP) at the metal and dielectric interface, which can greatly enhance the extraordinary optical transmission (EOT) through a nanoslit milled in the metal film. We present a structure with a 50-nm-wide silver nanoslit for EOT by coupling light into the dielectric interlayer between periodic strips and a metal film. When the period of the metallic strips is equal to the wavelength of the SPR, the transmission efficiency of 187.6 through the nanoslit is enhanced. The metallic strip width over the nanoslit is optimized to improve transmission efficiency, and the maximal efficiency of 204.3 is achieved.

© 2010 Chinese Optics Letters

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(240.6680) Optics at surfaces : Surface plasmons
(310.6628) Thin films : Subwavelength structures, nanostructures

Huajun Zhao and Dairong Yuan, "Enhanced optical transmission through a nanoslit by coupling light between periodic strips and metal film," Chin. Opt. Lett. 8, 1117-1119 (2010)

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