Guiding of two-dimensional optical waves in a negative dielectric gap having a dielectric core

Junichi Takahara; Fuminori Kusunoki; Tetsuro Kobayashi

doi:10.1117/12.616087

18 August 2005 Guiding of two-dimensional optical waves in a negative dielectric gap having a dielectric core

Junichi Takahara, Fuminori Kusunoki, Tetsuro Kobayashi

Proceedings Volume 5928, Plasmonic Nano-imaging and Nanofabrication; 59280D (2005) https://doi.org/10.1117/12.616087
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

Citation Download Citation

Junichi Takahara, Fuminori Kusunoki, and Tetsuro Kobayashi "Guiding of two-dimensional optical waves in a negative dielectric gap having a dielectric core", Proc. SPIE 5928, Plasmonic Nano-imaging and Nanofabrication, 59280D (18 August 2005); https://doi.org/10.1117/12.616087

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