Application of nonlinear resonant cavities for designing all optical Majority gate

We are going to design an optical Majority gate. Photonic crystals will be used for designing this structure. Resonant cavities are used to realize the threshold switching for the working mechanism of the optical Majority gate. Doped glass rods are added to cavities to create the nonlinear cavities. The simulations are done with Rsoft photonics CAD based on finite difference time domain method. The proposed majority gate has 3 input ports and only one output port. The output port is ON, when at least two of the input ports are ON. The working wavelength of the proposed structure is 1550 nm. For the proposed all optical majority gate the ON/OFF contras ratio and the bit rate are 19.5 dB and 500 GS/s respectively.