Appearance of photonic minibands in disordered photonic crystals.

Abstract

We have demonstrated the appearance of photonic minibands within the photonic bandgaps of a disordered system represented by randomly distributed 'vacancies' of air cylinders. The positions of the photonic minibands are defined by the energies of the localized photonic states of the single defect, and their width increases with increase in the concentration of the defects. The appearance of the minibands makes possible the construction of spectral filters with thin transmission bands.