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Proceedings Paper

Guiding of two-dimensional optical waves in a negative dielectric gap having a dielectric core
Author(s): Junichi Takahara; Fuminori Kusunoki; Tetsuro Kobayashi
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Paper Abstract

Index-guide of surface plasmon polariton in negative dielectric gap waveguides is studied theoretically. Concepts of low-dimensional optical waves and wavenumber surface are introduced for simplicity. Propagation properties of two-dimensional optical waves in a metal gap waveguide are calculated by means of an effective index method and FDTD calculations. A wave front of two-dimensional optical waves expands as cylindrical waves and optical beams confined in the gap have the two-dimensional diffraction limit. It is shown that the beam width of two-dimensional optical waves can be squeezed to nanometer order by decreasing the gap distance. A dielectric core embedded in the gap can be used as an efficient nano-optical waveguide.

Paper Details

Date Published: 18 August 2005
PDF: 10 pages
Proc. SPIE 5928, Plasmonic Nano-imaging and Nanofabrication, 59280D (18 August 2005); doi: 10.1117/12.616087
Show Author Affiliations
Junichi Takahara, Osaka Univ. (Japan)
Fuminori Kusunoki, Technology Research Institute of Osaka Prefecture (Japan)
Tetsuro Kobayashi, Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 5928:
Plasmonic Nano-imaging and Nanofabrication
Satoshi Kawata; Vladimir M. Shalaev; Din Ping Tsai, Editor(s)

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