New method to improve bit-rate of all-optical logic gate based on 2D photonic crystal

In this paper, we introduce a new method to improve bit-rate of all-optical logic gate. At first, we make some changes in conventional photonic crystal waveguides (CPCW), which improve bitrate of CPCW. We found by changing holes diameter near defect, the bit-rate can be varied via holes diameter variations. So, by finding maximum bit-rate in optimized photonic crystal waveguides (OPCW) and applying it in to an all-optical logic gate, the improvement can be seen. This can be achieved by first, finding the best bit-rate of OPCW then, applying OPCW in to an alloptical logic gate to find best answer for all optical logic gate, which considers this structure works functional. At the end, The results show that bit-rate of all-optical logic gate improved from 0.976 Tbit/s to 1.52 Tbit/s.