激光与光电子学进展, 2019, 56 (18): 182301, 网络出版: 2019-09-09
二维光子晶体全光逻辑门的设计与仿真 下载: 1261次
Design and Simulation of Two-Dimensional Photonic Crystal All-Optical Logic Gates
光学器件 全光逻辑门 时域有限差分法 光子晶体 optical devices all-optical logic gates finite-difference time-domain method photonic crystal
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218 fs以内,在集成光学领域具有潜在的应用前景。
Abstract
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.
刘振, 吴蓉, 严清博, 吴小所. 二维光子晶体全光逻辑门的设计与仿真[J]. 激光与光电子学进展, 2019, 56(18): 182301. Zhen Liu, Rong Wu, Qingbo Yan, Xiaosuo Wu. Design and Simulation of Two-Dimensional Photonic Crystal All-Optical Logic Gates[J]. Laser & Optoelectronics Progress, 2019, 56(18): 182301.