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High-performance and ultrafast configurable all-optical photonic crystal logic gates based on interference effects

机译：高性能和超快可配置的全光学光子晶体逻辑栅栏基于干扰效应

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This paper presents a configurable structure to realize all-optical photonic crystal logic gates based on the interference effects. The photonic crystal waveguides are realized by creating defects in a square lattice of silicon rods in the air. The proposed structure consists of four input ports, including two ports for applying input signals of logic functions and two ports for applying control signals. Therefore, all-optical NOT, OR, XOR, AND, NOR, and NAND logic gates as well as A • B and A + B logic functions can be implemented. Simulations are performed using the finite-difference time-domain method. The simulation results show high extinction ratios (ERs) of logic gates operating in the optical communication C band. The lowest ER_(min) is related to the NAND logic gate with a value of 14.2 dB at the wavelength of 1.55 μm. The maximum propagation delay is equal to 285 fs, corresponding to the OR and AND logic gates. Also, the total footprint of the structure is about 192 μm~2. The presented configurable structure is a promising candidate for use in integrated photonic circuits.
机译：本文介绍了一种可配置结构，可根据干扰效果实现全光学光子晶体逻辑门。通过在空气中产生硅棒的方形晶格中的缺陷来实现光子晶体波导。所提出的结构由四个输入端口组成，包括两个端口，用于应用逻辑功能的输入信号和用于应用控制信号的两个端口。因此，可以实现所有光学不是，XOR和，NAR和NAND逻辑门以及A•B和A + B逻辑功能。使用有限差分时间域方法进行仿真。仿真结果显示了在光通信C波段中操作的逻辑门的高消光比率（ERS）。最低的ER_（min）与NAND逻辑门相关，其中值为14.2dB的波长为1.55μm。最大传播延迟等于285 fs，对应于或和和逻辑门。而且，结构的总占地面积约为192μm〜2。所呈现的可配置结构是用于集成光子电路的有希望的候选者。

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