摘要
当电磁波在周期性介质中传播时,会因布拉格散射形成电磁波禁带,导致电磁波在一定的频率范围内不能传播。为解决上述问题,在空气背景下以氧化铝材料构建了两种不同类型的正方晶格,利用有限元法求解了3种不同光子晶体的能带,其中两种是由第一种滑移操作得来的;然后通过对两种不同类型的晶格进行拼接,构建超元胞,最终实现了拓扑边缘态;通过分析单晶格元胞能带,总结出拓扑边缘态形成的位置原因,提出的该方法形成的拓扑边缘态能对电磁波通过的频率进行相应的调控,为可调微波器件提供了新颖的设计思路。
When electromagnetic waves propagate in periodic media,they cannot propagate in a certain frequency range due to the bandgap of electromagnetic waves formed by Bragg scattering.In order to solve the above problem,two different types of square lattice are constructed with alumina material under the background of air,and the energy bands of three different photonic crystals are solved by the finite element method.Two of them are derived from the first sliding operation;Then,by splicing two different types of lattices,the supercell is constructed,and the topological edge state is finally realized.By analyzing the single lattice cell energy band,the position reason for topological edge state formation is summarized,and the topological edge state formed by the proposed method can regulate the passing frequency of electromagnetic wave accordingly,which provides a novel design idea for tunable microwave devices.
作者
刘子逸
李健飞
陈晨
姚静锋
袁承勋
LIU Ziyi;LI Jianfei;CHEN Chen;YAO Jingfeng;YUAN Chengxun(School of Physics,Harbin Institute of Technology,Harbin 150001)
出处
《飞控与探测》
2025年第4期37-42,共6页
Flight Control & Detection
基金
国家重点基础研究发展计划(2022YFE0204100)。
关键词
光子晶体
能带结构
边缘态
电磁波调控
正方晶格
photonic crystal
band structure
edge state
electromagnetic wave regulation
square lattice
作者简介
刘子逸,男,博士生;通信作者:李健飞,男,博士,助理教授;通信作者:姚静锋,男,博士,副教授,博士生导师;通信作者:袁承勋,男,博士,教授,博士生导师。
