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Proceedings Paper

Properties of three-dimensional plasmonic slot waveguides
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Paper Abstract

We investigate the properties of the modes supported by three-dimensional subwavelength plasmonic slot waveguides. We show that the fundamental mode supported by a symmetric plasmonic slot waveguide, composed of a subwavelength slot in a thin metallic film embedded in an infinite homogeneous dielectric, is always a bound mode. Its modal fields are highly confined over a wavelength range extending from zero frequency to the ultraviolet. We then show that for an asymmetric plasmonic slot waveguide, in which the surrounding dielectric media above and below the metal film are different, there always exists a cutoff wavelength above which the mode becomes leaky.

Paper Details

Date Published: 26 August 2008
PDF: 11 pages
Proc. SPIE 7032, Plasmonics: Metallic Nanostructures and Their Optical Properties VI, 703216 (26 August 2008); doi: 10.1117/12.794322
Show Author Affiliations
Georgios Veronis, Louisiana State Univ. (United States)
Shanhui Fan, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 7032:
Plasmonics: Metallic Nanostructures and Their Optical Properties VI
Mark I. Stockman, Editor(s)

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