二维光子晶体全光逻辑门的设计与仿真  

Design and Simulation of Two-Dimensional Photonic Crystal All-Optical Logic Gates

作　　者：刘振 吴蓉 严清博 吴小所 Liu Zhen;Wu Rong;Yan Qingbo;Wu Xiaosuo(School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China;Key Laboratory of Opto-Technology and Intelligent Control, Ministry of Education,Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China)

机构地区：[1]兰州交通大学电子与信息工程学院 [2]兰州交通大学光电技术与智能控制教育部重点实验室

出　　处：《激光与光电子学进展》2019年第18期230-237,共8页Laser & Optoelectronics Progress

基　　金：甘肃省自然科学基金(1610RJZA046);光电技术与智能控制教育部重点实验室(兰州交通大学)开放课题(KFKT2018-11)

摘　　要：基于线性干涉效应和环形谐振器,提出了一种二维光子晶体全光逻辑门的设计方法。通过在环形腔中引入光程差,产生相应的相位差,从而导致光波发生相长干涉或相消干涉,实现了或、与、异或、非、或非和与非等光学逻辑门。利用平面波展开法和时域有限差分法对逻辑器件进行模拟分析,对逻辑功能进行验证,结果表明:所设计的器件不仅物理尺寸小,而且透射率、对比度高,响应周期快,均在218fs以内,在集成光学领域具有潜在的应用前景。We propose a method to design two-dimensional photonic crystal all-optical logic gates based on the linear interference effect and ring resonators. The phase difference is generated by introducing the optical path difference in the ring cavity, which leads to the constructive or destructive interference of light waves. Thus, optical logic gates, such as OR, AND, XOR, NOT, NOR, and NAND, are realized. The plane-wave expansion and time-domain finite-difference methods are used to simulate the logic devices and verify the logic functions. The results demonstrate that small-sized devices can be realized. In addition, the devices have a high transmittance rate, high contrast ratio, and fast response time (less than 218 fs). The design has potential application in the field of integrated optics.

关 键 词：光学器件 全光逻辑门 时域有限差分法 光子晶体 

分 类 号：TN256[电子电信—物理电子学]