非互易性波导的有效模折射率研究  

Effective Mode Refractive Index of Nonreciprocal Waveguide

作　　者：王卓远 王金霞[1] 王聪 郑廷刚 WANG Zhuoyuan;WANG Jinxia;WANG Cong;ZHENG Tinggang(School of Electronic and Information Engineering,Ningbo University of Technology,Ningbo,Zhejiang,315211,China)

机构地区：[1]宁波工程学院电子与信息工程学院

出　　处：《宁波工程学院学报》2019年第4期1-6,共6页Journal of Ningbo University of Technology

摘　　要：研究设计了一种采用铁氧体材料、具有非互易特性的矩形波导,对波导内部旋磁材料平板内的电磁场分布进行分析求解,推导出在外偏置磁场作用下波导表面等离子体激元的单向传播性质,得到单向电磁边界模的色散关系;研究分析了该非互易性波导的有效模折射率的特点,以及结构参数对有效模折射率数值的影响。结果表明,该波导传播模式的数量随着波导宽度的增加而增多,而传播模式的有效模折射率却随之减小,并最终趋于一个稳定值。该现象不同于常规金属矩形波导,有望拓展非互易性波导结构在信息传输和光芯片集成领域的应用范围。A rectangular waveguide made of ferrite material with non-reciprocal characteristics is designed in this paper, analyzed and solved the electromagnetic field distribution in the rotating magnetic material plate inside the waveguide. And then deduced the unidirectional propagation properties of the waveguide surface palsmon under external bias magnetic field,the dispersion relation of unidirectional electromagnetic boundary modes also obtained. The characteristics of the effective mode refractive index(EMI) of the non-reciprocal waveguide and the influence of structural parameters on the EMI are analyzed by the numerical method. The results show that the number of propagation modes of the nonreciprocal waveguide increases with the increase of the waveguide width, while the EMI of the propagation mode decreases, and eventually tends to a stable value. This phenomenon is totally different from the conventional metal rectangular waveguide, and it is expected that the application range of the non-reciprocal waveguide structure could be expanded in the field of information transmission and optical chip integration.

关 键 词：非互易性 波导 有效模折射率 

分 类 号：TM154[电气工程—电工理论与新技术]