基于磁性表面等离激元的电磁波调控与相关光学器件的设计

项目名称： 基于磁性表面等离激元的电磁波调控与相关光学器件的设计

项目编号： No.11274277

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 刘士阳

作者单位： 浙江师范大学

项目金额： 78万元

中文摘要： 特异电磁介质是由亚波长共振单元所构造人工合成材料，在理论上能够设计具备任意电磁参量的电磁波介质，从而实现了自然界常规介质所不具备的光学性质和光学现象。本项目基于铁磁和铁电材料设计新型可调控的磁性特异电磁介质，在该体系中能够激发磁性表面等离激元共振，并且能够引起时间反演对称性的破坏，从而使其具备了极为特别的性质。本项目就是研究与磁性表面等离激元相关的光学现象和光学特性，主要研究内容包括：（1）推广多重散射理论和Mie散射理论以及等效介质理论，从而对该体系进行理论计算和模拟并提取体系的等效电磁参量；（2）探讨单向透射、单向隐身和单向成像的实现方案，并对相关性质进行分析，以设计相关的电磁波器件，如射频环行器和电磁波二极管；（3）研究梯度磁场下，采用磁性特异电磁介质实现负折射和亚波长聚焦的性质；（4）探讨无序磁性特异电磁介质表面的单向界面态激发、以及与其相关性质和物理机制。

中文关键词： 电磁超介质；电磁超表面；磁性表面等离激元；单向性；多重散射理论

英文摘要： Metamaterials are composite, artificial materials, consisting of resonant building blocks designed with state-of-the-art configurations,which leads to many exotic phenomena not occurring in nature such as negative refraction, subwavelength imaging, and cloaking. A particular characteristic of the system made of metallic materials is the excitation of surface plasmon polaritons (SPPs). The present project is devoted to invetigating the optical properties and phenomena relevant to "magnetic surface plasmon" (MSP), the magnetic analogue of SPP. It can be excited in the magnetic metamaterials made of ferrite materials. However, the MSP relevant issues are not examined elaborately as the case for the SPP in metallic materials. Besides, different from SPP the time reversal symmetry is broken in the MSP system under the exertion of external magnetic field. It can induce the nonreciprocal transport of the electromagnetic (EM) wave. Based on this feature, we can observe many interesting phenomena and design a series of useful EM devices. Our research is going to concern (i) extending multiple scattering theory, Mie theory, and effectivel medium theory so that we can analyze and simulate the system; (ii) investigating the feasibility to realize unidirectional transmission, cloaking, and imaging and then we are also going

英文关键词： metamaterial；metasurface；magnetic surface palsmon；unidirectionality；mutiple scattering theory