Design and Analysis of Optical Logic Gate using Two Dimension Photonic Crystal

In this paper, AND Logic gate functions are realized in a hexagonal lattice using 2D photonic crystal. The proposed logic gate is formed by the combination of resonance and interference phenomenon. Initially, the AND gate is designed without reference input which is considered as a two input logic gate and followed by another structure of photonic crystals with reference input is designed and its named as three input logic gate. The performance of proposed AND Logic gate structure is simulated by using 2D FDTD method. The simulation results show that the contrast ratio for two input AND gate and three input AND gate are 6.64 dB and 10.96 dB, respectively.