中国激光, 2020, 47 (10): 1013002, 网络出版: 2020-09-27
基于二维光子晶体的三输入全光逻辑与门 下载: 758次
Three-Input All-Optical AND Gate Based on Two-Dimensional Photonic Crystal
光学器件 光逻辑器件 三输入 光子晶体 线性干涉 optical devices optical logical device three-input photonic crystal linear interference
摘要
在完整的二维正方晶格硅中引入线缺陷和点缺陷,利用波导耦合和线性干涉,提出一种基于二维光子晶体的三输入全光逻辑“与”门。利用平面波展开法和时域有限差分法对所提与门进行仿真研究。结果表明,所提与门在波长为1544~1555 nm时对比度不小于3.5 dB,响应时间达到亚皮秒量级,点缺陷偏移介质柱可以横向偏移的范围为0.06~0.19 μm。本方案结构简单、工作波长范围较宽、响应时间较快,能实现三输入情况下的逻辑与。所提与门在全光信号处理系统和集成光路中具有重要作用。
Abstract
In this study, line defects and point defects are introduced in a completely two-dimensional square lattice silicon. Using waveguide coupling and linear interference, a three-input all-optical AND gate based on the two-dimensional photonic crystal is proposed herein. The proposed AND gate is simulated using the plane-wave-expansion method and finite-difference time-domain method. Results show that the proposed AND gate has a contrast ratio of not less than 3.5 dB when the input-light wavelength is between 1544 nm and 1555 nm, and the response time reaches the subpicosecond level. The acceptable horizontal offset of the point defect offset dielectric column is between 0.06 μm and 0.19 μm. The proposed solution exhibits a simple structure, a wide operating-wavelength range, a fast response time, and it can realize the AND gate in the case of three inputs. The proposed AND gate has potential applications in the field of an all-optical signal processing system and an integrated optical path.
徐光跃, 陈莹, 李培丽. 基于二维光子晶体的三输入全光逻辑与门[J]. 中国激光, 2020, 47(10): 1013002. Xu Guangyue, Chen Ying, Li Peili. Three-Input All-Optical AND Gate Based on Two-Dimensional Photonic Crystal[J]. Chinese Journal of Lasers, 2020, 47(10): 1013002.