Negative Group Velocity: Is It a Backward wave or Fast Light?

2008/07/30 by Eyal Feigenbaum, Feigenbaum, Eyal, Noam Kaminski +3
Physics and Astronomy · #FOS: Physical sciences #Optics (physics.optics) #physics.optics

paper · pdf · doi:10.48550/arxiv.0807.4915

5 figures

arxiv created 2008/07/30 · arxiv updated 2009/12/01

Abstract

When a negative slope of the dispersion curve is encountered, the propagating light may be either 'fast light' or 'backward propagating'. We show that causality considerations select only one of which for each scenario, and demonstrate that the same photonic (plasmonic) system can support both type of solutions depending on parameters.

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