A new tunable photonic crystal electro-optic device

In this paper, a new tunable photonic crystal electro-optic device is proposed and analyzed. In the proposed device, each period (or unit cell) of the photonic crystal lattice is composed of three different materials as ABAB´A in which A, B and B´ layers are materials such as GaAs, LiNbO₃ and KH₂PO₄, respectively. The refraction indices of the B and B´ layers are changed by applying voltage. We employ the transfer matrix approach to obtain the transmittance of the photonic crystal device, and transmission spectra are drawn for a different number of unit cells N = 10, 20 with consideration of TE and TM modes. We observe from these transmission spectra that the band width at the high frequencies region is broadened by means of an increase in applied voltage.