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Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Mar;65(3 Pt 2B):036608. Epub 2002 Feb 12.

Anomalous dispersion and superluminal group velocity in a coaxial photonic crystal: theory and experiment.

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1
Département de Physique et d'Astronomie, Université de Moncton, Moncton, New Brunswick, Canada E1A 3E9.

Abstract

We demonstrate that coaxial cables with a periodic impedance exhibit dispersion properties specific to photonic crystals, albeit on a much lower frequency scale. Highly superluminal (>2c) pulse propagation is observed near the photonic band gap at 10 MHz. The influence of group velocity dispersion and crystal length on the traveling speed and shape of a Gaussian pulse are discussed. Results compare favorably with a simple multilayer theory and a coupled-mass model of the structure.

PMID:
11909286
DOI:
10.1103/PhysRevE.65.036608
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