Investigation of transmission modes in a binary disordered photonic crystal

In this paper, the transmission spectrum of a disordered binary one dimensional photonic crystal with a defect layer is investigated in two states, the disordered of thickness and the disordered of optical path length in both polarizations TE and TM. Then the displacement of defect mode wavelengths is studied. As we observed the defect mode shifts toward the larger wavelength when the degree of disorder get increased in both symmetric and asymmetric cases. Furthermore, in a given degree of disorder the defect mode shifts toward the shorter wavelength as the incident angles get increased. These displacements are more tangible in TE polarization. In the symmetric structure the height of defect modes gets decreased by increasing the degree of disorder.