Optics and Photonics Society of Iran

In this paper the design and simulation process of an all optical logic NOR gate have been presented. We have designed the gate with a 2D square lattice of photonic crystals of dielectric rods, consisting of input waveguides and T-type ring resonators. To be suitable with communication wavelength 1.55 micrometer, the gate was designed to have a lattice constant of structure, refraction index, and radius of rods of 0.5943 micrometer, 3.1 and 0.1188 micrometer respectively. The plane wave expansion (PWE) method have been used for band gap extraction of structure. The designed gate has been simulated and analyzed by finite difference time domain (FDTD) methods. Due to the simple structure, the proposed device is compatible with optical integrated circuits.