基于旋磁光子晶体构成的单向波导设计研究  

A Study on Designing Unidirectional Waveguides Composed of GMPC

作　　者：杨艳[1] 伍瑞新[1] 

机构地区：[1]南京大学电子科学与工程学院,江苏南京210093

出　　处：《压电与声光》2013年第6期869-872,共4页Piezoelectrics & Acoustooptics

基　　金：教育部博士点基金资助项目(20110091110030;20100091120045);江苏省自然科学基金资助项目(BK2012722)

摘　　要：对基于旋磁光子晶体（GMPC）的微波段单向波导,讨论了GMPC的晶格常数和GMPC与金属限制层距离这两个因素对单向波导工作特性的影响.研究表明,GMPC的晶格常数将影响单向波导的工作频率,而GMPC与金属限制层的距离会影响波导中的传播模式,恰当的距离可使波导表现出良好的单向传输性能和较低的损耗.用钇铁石榴石铁氧体柱制作了微波段单向波导,实验测得该波导的单向传输频段（11.8～13.2 GHz）与仿真结果接近,且单向传输性能不受波导通道缺陷影响.For a microwave unidirectional waveguide comprising of gyromagnetic photonic crystals （GMPCs）,a discussion was made with emphasizing on the contributions of two factors,the lattice constant and the distance between metal confinement and GMPC,to the one-way waveguide＇s working characteristics.The study shows that the lattice constant has an evident effect on the unidirectional waveguide＇s working frequency,while the distance between GMPC and metal confinement influences the waveguide＇s modes of propagation.Suitable distance between GMPC and metal confinement leads the waveguide to presenting a better one-way transmission property and less loss.A microwave unidirectional waveguide has been fabricated with yttrium iron garnet ferrite rods,and the measured unidirectional-propagating regime （11.8～ 13.2 GHz） of this waveguide matches well with the simulated results.It is also demonstrated that the one-way propagating characteristic will not be affected by defects along the waveguide passage.

关 键 词：波导 光子晶体 微波铁氧体器件 手性边缘态 量子霍尔效应 

分 类 号：TN814[电子电信—信息与通信工程]