发光学报, 2018, 39 (12): 1772, 网络出版: 2018-12-25   

二维光子晶体全光异或门的设计及研究

Design and Study of Whole Optical XOR Logic Gate of Two Dimensional Photonic Crystals
作者单位
1 兰州交通大学 电子与信息工程学院, 甘肃 兰州 730070
2 甘肃省科学院 传感技术研究所, 甘肃 兰州 730070
摘要
分析了二维光子晶体马赫-曾德尔干涉仪的传输特性, 将二维光子晶体波导、环形腔和马赫-曾德尔干涉仪有效结合,提出了一种基于二维光子晶体马赫-曾德尔干涉仪的异或门设计。用平面波展开法分析二维光子晶体能带结构, 并用时域有限差分法验证光信号在该器件中的电场稳态分布。结果表明, 该结构能够实现异或逻辑, 且具有高逻辑对比度7.88 dB, 快速响应周期0.388 ps和高传输速率7.87 Tbit/s; 并且该器件结构尺寸仅为13 μm×14 μm, 易于集成。该异或逻辑结构中引入了二维光子晶体马赫-曾德尔干涉仪, 使得光子晶体逻辑门结构的设计更加多样, 并为二维光子晶体半加器与全加器的设计提供了基础, 具有重要的研究意义。
Abstract
Transmission characteristics of two-dimensional photonic crystals Mach-Zehnder interferometer are analyzed, then the two-dimensional photonic crystal waveguides, circular cavity and Mach-Zehnder interferometer are combined with a reasonable way. In the end, a XOR gate based on two-dimensional photonic crystals Mach-Zehnder interferometer is proposed. Plane wave expansion (PWE) is used to analyze the band structure of two-dimensional photonic crystal, and finite difference time domain(FDTD) is used to verify the steady-state distribution of optical signals in the device. The research shows that the structure can achieve XOR logical functions, with high logical contrast 7.88 dB, fast response cycle 0.388 ps and high transmission rate 7.87 Tbit/s. And the structure size is only 13 μm×14 μm so that it is easily to integrate. The XOR logic structure based on two-dimensional photonic crystals Mach-Zehnder interferometer, makes the design of photonic crystal logic gate more diverse, and it also provides the foundation for half adder and full adder design of two-dimensional photonic crystals, which has important research significance.
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张晓金, 梁龙学, 吴小所, 韩根亮. 二维光子晶体全光异或门的设计及研究[J]. 发光学报, 2018, 39(12): 1772. ZHANG Xiao-jin, LIANG Long-xue, WU Xiao-suo, HAN Gen-liang. Design and Study of Whole Optical XOR Logic Gate of Two Dimensional Photonic Crystals[J]. Chinese Journal of Luminescence, 2018, 39(12): 1772.

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