磁光效应下PT对称结构独特的非互易传输模式  

Unique Non-Reciprocal Mode with a Parity-Time Symmetric Structure under Magneto-Optic Effects

作　　者：王誉雅 夏景[1] 方云团[1] Wang Yuya;Xia Jing;Fang Yuntua(School of Computer Science and Communication Engineering,]iangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]江苏大学计算机科学与通信工程学院,江苏镇江212013

出　　处：《中国激光》2018年第12期306-311,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(61701199)

摘　　要：设计了一种嵌入磁性材料微腔的可调制的PT对称结构。通过传输矩阵法计算结构的传输谱,研究了磁微腔共振对PT对称结构的调制效应,得到一种可被入射角度方向和大小双重调制的增强的非互易带边模式,调制结果是带边模式在左右带边的转换。磁场大小的增加会导致带边模式向高频移动,磁场方向的变化也会引起带边模式在左右带边的转换。We design a tunable parity-time (PT) symmetric structure, in which magnetic microcavity is inserted. By transmission spectrum calculated by the transfer matrix method,we research the modulation effects of microcavity resonance under the applied magnetic field on PT symmetric structure. An enhanced non-reciprocal band-edge mode is obtained, which can be modulated by directions and sizes of incident angles. The modulation transforms the band-edge modes between the left and right edges of the band. Results reveal that the increase of the magnetic field causes the edge mode to move to high frequencies, and the change of magnetic field direction also causes the transformation of the band-edge modes between the left and right band edges.

关 键 词：微纳光学 PT对称结构 磁光调制 非互易性传输 带边模式 

分 类 号：O436[机械工程—光学工程]