We propose a photonic crystal-based all-optical AND, OR, and XOR logic gates using square lattice silicon rods with air background. The design of proposed logic gates works on beam interference principle and operates efficiently by changing phase of light beams at 1550 nm wavelength. The proposed AOX logic gates are implemented with only one structure with variations in the phase of applied input signals. Simulation and verification of design are done by using finite-difference time-domain method. The design offers a contrast ratio of 33.05 dB, 10.50 dB, and 8.29 dB of proposed AND, OR, and XOR logic gates correspondingly with optimized refractive index and silicon rod radius values.

我们提出了一种基于光子晶体的全光学“与”，“或”和“异或”逻辑门，其使用具有空气背景的方形晶格硅棒。所提出的逻辑门的设计基于光束干涉原理，并通过改变1550 nm波长的光束相位来有效地工作。所提出的AOX逻辑门仅采用一种结构来实现，所施加的输入信号的相位会发生变化。采用有限差分时域方法进行了设计仿真和验证。该设计提供了33.05 dB，10.50 dB和8.29 dB的对比度，分别是建议的AND，OR和XOR逻辑门，具有最佳的折射率和硅棒半径值。