非厄米PT对称多通道光波导体系的调控及动力学  

Regulation and dynamics of non-Hermitian PT symmetric multi-channel optical waveguide system

作　　者：孙武 叶伏秋[1] 张光成 SUN Wu;YE Fu-Qiu;ZHANG Guang-Cheng(College of Physics and Mechanical Engineering,Jishou University,Jishou 416000,China)

机构地区：[1]吉首大学物理与机电工程学院,吉首416000

出　　处：《原子与分子物理学报》2025年第1期108-117,共10页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(12165008);吉首大学研究生科研项目(Jdy22040)。

摘　　要：宇称-时间(PARITY-TIME PT)对称光学波导系统中有关PT对称性的调控主要通过周期性变化的复折射率材料来实现.本文中我们给出了一种对于已耦合的双通道波导体系中额外引入周期调制的中性波导操纵PT对称性的构型,通过高频近似将系统转换为重整化参数后的等效未调制系统后,发现可以通过额外引入单频周期调制的光波导去调控体系的PT对称性,并且讨论了周期调制的非厄米三通道波导体系的能谱特性.最后通过解析和数值的方法给出了光在非厄米三通道光学波导中的动力学演化.The regulation of Parity-Time(PT)symmetry in the PT symmetric optical waveguide system is mainly realized by the periodic change of complex refractive index materials.In this paper,we give a configuration of manipulating the PT symmetry for the neutral waveguide with additional periodic modulation in the coupled dual-channel waveguide system.After the system is converted into an equivalent unmodulated system with renormalization parameters by high-frequency approximation,it is found that the PT symmetry of the system can be regulated by introducing an additional single-frequency periodic modulation optical waveguide,and the energy spectrum characteristics of the system with periodic modulation of non-Hermitian three-channel waveguide are discussed.Finally,the dynamic evolution of light in non-Hermitian three-channel optical waveguide is given by analytical and numerical methods.

关 键 词：PT对称 非厄米 三通道波导 

分 类 号：O431.2[机械工程—光学工程]