Plasmonic waveguides are negative dielectric optical waveguides in waveguide theory. These are promising candidates of nano-optical waveguides beyond diffraction limit of light. We describe principles for guiding nano-sized optical beams in plasmonic waveguide from the viewpoint of low-dimensional optical waves and wavenumber surface. We review unique properties of plane (2D) and cylindrical (1D) types of plasmonic waveguides.

© 2008 Optical Society of America

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