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Enhancement of Plasmon Propagation Length Using Metamaterials

Published online by Cambridge University Press:  26 February 2011

David Brandon ,
Arkadii Krokhin  and
Arup Neogi
David Brandon
Affiliation:
DBMcNeil@UNT.edu, University of North Texas, Physics, 211 Ave. A, Denton, TX, 76203, United States
Arkadii Krokhin
Affiliation:
Arkady@UNT.edu, University of North Texas, Physics, 211 Avenue A, Denton, TX, 76203, United States
Arup Neogi
Affiliation:
Arup@UNT.edu, University of North Texas, Physics, 211 Avenue A, Denton, TX, 76203, United States
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Abstract

We propose using a strongly anisotropic dielectric as a substrate for a thin metallic film along the boundary of which surface plasmon excitations may propagate. We show that the propagation range of surface plasmons is increased if the substrate is a birefringent dielectric crystal with a properly oriented optical axis. The increase of the propagation range depends on the degree of anisotropy, and, consequently, it turns out to be small for substrates of natural optical crystals, where anisotropy is weak. However, in specially designed photonic crystals, the anisotropy may be very strong, thus leading to appreciable increase of the propagation range. A photonic-crystal substrate, being a medium with nonlinear dispersion, also affects the dispersion law of the surface plasmon. All these effects may be used in order to increase the efficiency of modern plasmonic and optoelectronic devices.

Keywords

crystalnanostructurenanoscale
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 964: Symposium R – Meta-Materials at the Milli-, Micro-, and Nanoscale , 2006 , 0964-R01-08
Copyright
Copyright © Materials Research Society 2007

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