Experimental observation of superluminal group velocities in bulk two-dimensional photonic bandgap crystals
arXiv:quant-ph/0309109
Abstract
We have experimentally observed superluminal and infinite group velocities in bulk hexagonal two-dimensional photonic bandgap crystals with bandgaps in the microwave region. The group velocities depend on the polarization of the incident radiation and the air-filling fraction of the crystal.
8 pages, 7 figures