Propagation of electromagnetic radiation through a one-dimensional superlattice doped with impurity plasma layers

The virtual crystal approximation is employed to carry out a numerical modeling of a nonideal one-dimensional Si-based photonic crystal comprised of topologically ordered sets of layers with randomly included doping plasma layers. The constructed model proves efficient for evaluation of the photonic band gap as a function of plasma layer concentration. The presence of defect layers is shown to significantly alter the photonic spectrum of the superstructure. Calculations show that an appropriate choice of dopant concentration is capable of reducing the band gap to zero, thus turning the lattice into a frequency filter.