Negative dispersion: a backward wave or fast light? Nanoplasmonic examples

Propagation of light in a negative dispersion regime (antiparallel phase and group velocities) may be attributed to either fast light or a backward wave. We show that by applying causality, only one of these is valid for each scenario. A nanoplasmonic structure is shown to support both types of solu...

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Bibliographic Details
Published inOptics express Vol. 17; no. 21; pp. 18934 - 18939
Main Authors Feigenbaum, Eyal, Kaminski, Noam, Orenstein, Meir
Format Journal Article
LanguageEnglish
Published United States 12.10.2009
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Summary:Propagation of light in a negative dispersion regime (antiparallel phase and group velocities) may be attributed to either fast light or a backward wave. We show that by applying causality, only one of these is valid for each scenario. A nanoplasmonic structure is shown to support both types of solution depending on the parameters.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.17.018934