SPPs光场局域增强及调控在通信、光探测、能量转换、非线性光学过程、生物传感、数据存储、高分辨成像等各方面都有重要应用，近年来受到广泛关注。其中，2017年，Tsakmakidis等人在science上提出磁光材料非互易系统，开辟光强局域增强及调控新思路，但其强磁场条件使实际实现面临挑战。相较而言，基于PT对称及渐变光栅的非互易传输系统更具借鉴性。另外，作为近期研究热点的石墨烯SPPs较其它SPPs方式不但能支持太赫兹波段，且具有高可调控性和更好的场局域增强效应。基于此，本项目提出石墨烯SPPs非互易传输系统光场局域调控研究，研究系统构建参数条件及光场局域调控规律，并在实验上展开研究。项目的开展对推进光场局域增强及调控在生物、物理等领域深入应用都具有十分积极意义。目前我们已在PT对称、渐变光栅、SPPs器件理论及实验方面积累了研究经验，为本项目的开展打下了基础。

Due to the important potential applications in optical communication, detecting, transducer, nonlinear process, biosensing, optical storage, imaging, etc., enhancing and tuning of SPPs Localization have recently attract much attentions. Especially, magnetized semiconductor non-reciprocal systems were proposed by Tsakmakidis et al. in journal of SCIENCE in 2017, opening a new way to enhance and tune the localization of light. However, requirement of huge magnetic is a challenge for practice. Comparatively, PT-symmetric and graded grating systems may offer another alternative. Moreover, as the current research hotspot, graphene SPPs not only can support terahertz wave propagating, but also provide higher tunability and better enhancement than other SPPs modes. In term of these, studies on tuning of wave localization in graphene plasmonic non-reciprocal systems are proposed in this project. In which, structural parameters to construct the systems and physical laws to tune the wave localization are explored theoretically and experimentally. Surely the developing of this project will facilitate enhancing and tuning of wave Localization to apply more deeply in domains including physics and biology. So far, we have got some experience on research of PT-symmetric, graded grating and SPPs devices, building the foundation for the going of this project.