电子驱动介质加载异常透射结构的太赫兹辐射源研究

项目名称： 电子驱动介质加载异常透射结构的太赫兹辐射源研究

项目编号： No.61501094

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 张平

作者单位： 电子科技大学

项目金额： 23万元

中文摘要： 异常透射结构具有独特的特性并存在很多潜在的应用，它已成为近年来国际上的一个极具价值的研究热点。在研究其性质时通常采用平面波激励的方式，这种方式比较方便揭示其透射和反射特性，但却无法直接研究其辐射特性。本项目拟采用自由电子激励的方式来研究异常透射结构的辐射特性，深入分析其中发生的一些新现象，特别是表面波转化为辐射场的现象，系统深入的研究物理机制并用于太赫兹辐射源的研究中。首先，采用粒子模拟仿真方法研究自由电子激励介质加载异常透射结构的辐射特点，探索辐射产生的条件和基本特性；同时结合理论分析进行数值计算，深入研究物理机制和规律。进而，基于表面波转化为辐射场的机制，研究太赫兹波段异常透射现象，深入探索增强表面波的方法。最后，完成基于太赫兹波段表面波转化为辐射场机制的辐射源设计，并完成一系列理论分析、数值计算和实验验证工作。

中文关键词： 太赫兹辐射源；异常透射；衍射辐射；表面波

英文摘要： Extraordinary transmission structure has become one of the key valuable researches in recent years, due to its unique features and a lot of potential applications. The method of plane wave excitation is usually used to investigate its properties, since this way is more convenient to reveal the transmission and reflection characteristics. However it can not study the radiation characteristics directly. In this project, we adopt the way of free electrons excitation to study the radiation characteristics of the extraordinary transmission structure with dielectric medium loading, and analyze the radiation phenomena, especially the surface wave is transformed into radiation. And then, based on this mechanism, a new kind of terahertz radiation source will be developed. First of all, by using particle-in-cell code to simulate the extraordinary transmission structure with dielectric medium loading, the radiation characteristics and the radiation conditions are studied, and the physical mechanism is revealed by combining theoretical analysis with numerical calculation. Then, based on the mechanism of surface wave transformed into radiation, the enhanced transmission are studied, and the way to enhance the surface wave will be explored. Finally, according to the mechanism of surface wave transformed into the terahertz band radiation, the THz radiation source models are given, and a series of theoretical analysis, numerical calculations and experimental verifications are accomplished.

英文关键词： THz radiation source;extraordinary transmission;diffraction radiation;surface wave