基于磁光介质谐振结构的非互易超构表面研究

非互易超构表面，是指在亚波长厚度的人工电磁周期结构中实现电磁波非互易传输的新型电磁辐射控制结构，有望应用于下一代自由空间微波隔离器、光隔离器、光环行器等领域。本项目针对非互易光学材料集成化和小型化的需求，以及现有非互易超构表面的问题，发展一类基于磁光介质谐振结构的非互易超构表面，实现电磁波的非互易传播。拟开展三方面的研究：①静磁模拟和有限元仿真，建立磁光介质谐振结构的电磁波传输理论模型；②设计相位梯度型非互易超构表面结构，实现广义的电磁非互易性；③实验制备磁光非互易超构表面，实现无外场偏置下的电磁波非互易传输。本项目的开展将建立磁光介质谐振结构和相位梯度型非互易超构表面的理论模型，发展线性、无源、无外场偏置非互易光学材料和结构的制备方法，为发展新一代非互易光学器件奠定材料基础。

Non-reciprocal metasurface refers to a novel electromagnetic radiation control structure that realizes electromagnetic wave non-reciprocal transmission in a sub-wavelength thickness artificial periodic structure. It is expected to be applied to next generation free space microwave isolator, optical isolator, optical circulators. This project aims to solve several challenges in existing non-reciprocal metasurfaces. The first is the difficulty to meet the application requirements of passive, linear and no-field biasing structures. Second is that phase gradient non-reciprocal metasurface theory and design method is still lacking. Third is that it is difficult to experimentally fabricate optical frequency non-reciprocal metasurfaces. The project proposes a non-reciprocal metasurface based on a magneto-optical dielectric resonance structures to achieve non-reciprocal propagation of electromagnetic waves. The project will be carried out based on 3 research topics: ① Magnetostatic simulation and finite element simulation to establish the theoretical model of electromagnetic wave transmission in magneto-optical dielectric resonance structures; ② Design pof hase gradient non-reciprocal superstructure surface structure to realize generalized electromagnetic non-reciprocity; ③Experimentally preparation of high quality factor magneto-optical nonreciprocal metasurface which operates under no external field biasing. The development of this project will establish theoretical models and experimental methods for magneto-optical dielectric resonance structures and phase-gradient non-reciprocal metasurfaces, which provides a material foundation for the development of a new generation of non-reciprocal optical devices.