| Citation: | WU Rong, ZHANG Hao-chen, YANG Jian-ye. Design of all-optical logic gate based on two-dimensional photonic crystal[J]. Chinese Optics, 2024, 17(1): 245-251. doi: 10.37188/CO.EN-2023-0014
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By embedding a line defect in a two-dimensional photonic crystal and using linear interference effect and waveguide coupling, an XNOR gate and NAND gate structure based on a two-dimensional photonic crystal is designed. The band structure of the two-dimensional photonic crystal is analyzed by using the plane wave expansion method. The time-domain finite-difference method and the linear interference effect are used to simulate the stable electric field diagram and the normalized power of the XNOR gate and NAND gates on the Rsoft platform. The simulation results demonstrate that the designed XNOR gate has a contrast of 29.5 dB, a response time of 0.073 ps, and a data transmission rate of 13.7 Tbit/s. On the other hand, the designed NAND gate has a contrast of up to 24.15 dB, a response time of 0.08 ps, and a data transmission rate of 12.5 Tbit/s. It can be seen that the designed structure has a high contrast, short response time, and fast data transmission rate.
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