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Enhancement of light transmission through nanoslit in a circular metallic film flanked by parallel periodic gratings

Published online by Cambridge University Press:  01 February 2011

Dinesh Kumar
Affiliation:, University of Tsukuba, Center for Tsukuba Advanced Research Alliance (TARA), 1-1-1 Tennodai, Tsukuba, Ibaraki, Tsukuba, 305-8577, Japan, +81-29-853-6448, +81-29-853-6448
Kiyoshi Asakawa
Affiliation:, University of Tsukuba, Center for Tsukuba Advanced Research Alliance (TARA), 1-1-1 Tennodai, Ibaraki, Tsukuba, 305-8577, Japan
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We investigate the potential of a slit grating structure on a silver film embedded in a high index dielectric film, as a Plasmonic optical antenna in infrared region. Using FDTD calculations it is demonstrated that the transmission properties of the structure has strong dependence on the dimension of dielectric film. By tapering the height of output gratings directionality of the emitted beam has been improved. We propose the application of the Plasmonic antenna and examine its performance in axial injection of light from single mode fiber to photonic crystal waveguide.

Research Article
Copyright © Materials Research Society 2008

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