基于磁化表面等离子体激元的可重构漏波天线研究

This project is targeting at the dynamical control of electromagnetic waves produced by surface plasmonic polaritons (SPPs) from THz to optical band. The leaky-wave antenna based on magnetized SPPs is constructed. By utilizing the external magnetic field, the radiation strength, the radiation direction, the operating band of the antenna can be controlled dynamically. The project is going to accomplish the following research: (1) The mechanism of the influence of the magnetic field on the radiation of the magnetized SPPs is theoretically analyzed. (2) Utilizing magneto-optical material, metal, etc., the geometry supporting the magnetized SPPs is designed, such as the metal-insulator-metal geometry, the monopole geometry, etc. The electromagnetic waves are leaked through brims of the dielectric interface or slots of the geometry. The external magnetic field is utilized to dynamically control the characteristics of the antenna. (3) Electromagnetic software is used to model the antenna and computationally analyze the reconfigurability of the antenna. By employing physical or chemical method, the structure of the leaky-wave antenna based on magnetized SPPs is fabricated. The external magnetic field is added into the experimental environment and the reconfigurable performance of the antenna is practically measured. Although the researches on SPPs are developing rapidly, the effects of the external magnetic field on the performance of the leaky-wave antenna based on SPPs are still waiting for investigation. The reconfigurable leaky-wave antenna based on magnetized SPPs investigated by this project is of practical value for novel applications like optical ICs, ultra high resolution etching, electrical microscope, THz communication, etc.

针对太赫兹~光频段的表面等离子体激元电磁波的动态控制方面的应用，构造基于磁化表面等离子体激元的漏波天线，利用外磁场动态控制天线辐射强度、辐射方向、工作频段等特性。研究：(1)从理论上分析磁化表面等离子体激元辐射特性受外磁场影响的原理；(2)使用磁光材料、金属等材料，设计平面夹层、单极子等结构支持磁化表面等离子体激元，并在其介质分界面边缘或开槽处泄漏和辐射电磁波。利用外磁场动态控制天线特性；(3)利用软件对天线建模并仿真分析天线动态可重构特性；用物理加工或化学制备方法加工基于磁化表面等离子体激元的漏波天线的物理结构。施加外磁场，实际测试天线动态可重构特性。表面等离子体激元研究发展迅速，但是用外磁场动态控制基于磁化表面等离子体激元的漏波天线特性方面的研究尚待探索。本项目研究的基于磁化表面等离子体激元的可重构漏波天线对于光集成电路、超高分辨率雕刻、电子显微镜、太赫兹通信等新兴领域具有应用价值。

针对太赫兹~光频段的表面等离子体激元电磁波的动态控制方面的应用，研究了基于表面等离子体激元的辐射、滤波期间，利用外磁场/外电场动态控制期间的辐射强度、工作频段等特性。具体地：.(I) 设计了基于磁化表面等离子体激元的漏波天线的几何构造；.(II) 开展了基于磁化表面等离子体激元的漏波天线的理论分析与仿真研究；.(III) 实验研究了天线辐射特性受到人工电磁媒质作用与调控的情况。