Propagation of coherent and partially coherent pulses through one-dimensional photonic crystals

The propagation of coherent and partially coherent light pulses through a one-dimensional photonic crystal ( 1DPC ) is investigated. The dependence of the evolution of the pulses inside the 1DPC on incident angles and the effect of the coherence of the pulses on the propagation properties are discussed. The evolution of a pulse inside the 1DPC is affected by the coherence of the pulse. As the coherence decreases, superluminal proprogation changes to subluminal propagation.