Anomalous behaviour of light reflection in crystals with different homogeneity

Abstract The light reflection as a function of the sample length has been studied for an ideal two-dimensional photonic crystal and for a two-dimensional photonic structure with smaller homogeneity with respect to the photonic crystal. We have found that, although the number of the scattering elements is constant for the two structures, the behaviour of the light reflection increases linearly with the sample length in the less homogeneous photonic structure, while it is strongly sub-linear in the photonic crystals.