电磁波在双曲超构材料中的传播与控制

The hyperbolic metamaterials are a new kind of electromagnetic (EM) materials. They can not only tailor the propagation of EM waves, but also manipulate the interactions between EM waves and atoms as well as the interactions between different atoms. This project studies theoretically and experimentally the propagation and control of EM waves in hyperbolic metamaterials. The study contains two parts. The first part deals with the manipulation of near-field coupling between EM atomic-like resonators by hyperbolic metamaterials in the classical counterpart of electromagnetic induced transparency. The second part studies the transition between two kinds of hyperbolic metamaterials and the novel EM phenomena as well as the applications brought by the cone-shaped isofrequency surface of the critical hyperbolic metamaterials at the transition point. The achievements of this project not only help people control the flow of EM waves and break through the limitation of traditional materials on the functions of EM waves by means of the hyperbolic or cone-shaped dispersions, but also play an important role in the design of related devices including long range energy transfer device, beam splitter, etc.

双曲材料作为一种新的电磁材料，不仅可以调控电磁波的传播，而且可以调控电磁波和原子之间、原子和原子之间的相互作用。本项目围绕电磁波在双曲材料中的传播与控制展开理论和实验研究。研究内容分两部分。首先，项目将研究类电磁感应透明现象中，双曲材料对电磁类原子之间近场耦合作用的调控。其次，项目将研究两类双曲材料之间的转变以及临界双曲材料中的锥形等频率面带来的新奇电磁现象和应用。项目的研究成果不仅可以帮助人们利用双曲或锥形等特殊色散关系来调控电磁波的运动，突破传统材料对电磁波功能的限制，而且对远距离能量传输器和分光器等相关器件的研制具有指导意义。

本项目主要研究双曲超构材料中的光场调控。在光学远场调控方面，基于双曲材料对远场传播相位的特殊调控作用，项目在含双曲材料的一维复合结构中实现了随入射角零移以及红移的特殊光子带隙和共振模，并应用于设计宽角度的偏振选择器、光吸收器、滤波器和传感器。在光学近场调控方面，基于双曲材料具有支持大波矢近场模式的特性，项目研究了双曲材料对类电磁感应透明中的近场耦合距离的增强、线性交叉材料中的亚波长平面成像和亚波长双曲波导。项目不仅研究了双曲材料对光学远场和近场的特殊调控作用，而且对需要在宽角度范围工作的光学器件和超分辨成像器件的研制具有指导意义。