Abstract:In this work, a new configuration of an all-optical nonlinear de-multiplexer gate based on two-dimensional photonic crystals is proposed. The gate is considered in the double-ring resonator shaped structure of Silicon rods. In order to have a more functional structure, some defect rods made of nonlinear materials were positioned in the structure. For consider-ing the functionality of the structure, photonic band gap (PBG), field distribution and transmitted power spectra are in-vestigated. Plane wave expansion and finite-difference-time-domain methods are utilized for extracting the PBG and field distribution diagrams. The remarkable dimension, bit rate, maximum intensity and contrast ratio of 116.64μm2, 3.125Tbit/s, 97% and 40.2dB are obtained, respectively which make the gate an appropriate candidate for utilization in optical integrated circuits.