title: Anomalous dispersion and superluminal group velocity in a coaxial photonic crystal: theory and experiment.
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.
authors.affiliation: Département de Physique et d'Astronomie, Université de Moncton, Moncton, New Brunswick, Canada E1A 3E9.
authors.forename: A
authors.initials: A
authors.lastname: Haché
authors.forename: L
authors.initials: L
authors.lastname: Poirier