基于级联非线性微腔的全光二极管研究  

Investigation into All-Optical Diode Based on Cascaded Nonlinear Microcavity

作　　者：李潮[1,2] 王敏[1] 刘道柳[1] 胡永禄 吴俊芳[1,2] 

机构地区：[1]华南理工大学物理与光电学院,广东广州510640 [2]威斯康星大学麦迪逊分校,美国威斯康星麦迪逊53705

出　　处：《华南理工大学学报（自然科学版）》2017年第6期15-19,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11304099);广东省自然科学基金资助项目(S2013040015639);华南理工大学中央高校基本科研业务费面上项目(2014ZM0077)~~

摘　　要：全光二极管是未来光通信和光计算中的关键器件之一.文中通过仿真实验,利用时域有限差分法研究了一种新型非线性光子晶体全光二极管的非互易光传输特性,提出通过利用两个超短脉冲泵浦对光子晶体直接耦合微腔与侧边耦合微腔分别进行泵浦,以对两个微腔的非线性光学双稳态进行精确调控,从而在较宽的工作带宽内(0.44 nm,是已报道的数十倍)实现信号光的单向高透射率(可达90%),同时可获得较高的正反向传输对比度(超过80).All-optical diode is one of the key devices of future optical communication and photonic computer. In this paper, the nonreciprocal optical transmission characteristics of a new-type all-optical diode based on nonlinear photonic crystal （PC） are analyzed by means of finite difference time domain, and two ultrashort pulse lasers are used to pump the PC directly-coupled microcavity and the side-coupled microcavity, respectively, so that the non- linear optical bistable state of the two microcavities can be accurately adjusted and a high-performance optical di- ode, which is of a unidirectional transmission rate up to 90% and a forward-reverse transmission contrast ratio of more than 80, is realized in a broad operating bandwidth of more than 0. 44 nm （ dozens of times that in the literature）.

关 键 词：全光二极管 光子晶体 光学双稳态 时域有限差分法 

分 类 号：TN256[电子电信—物理电子学]