近零参数电磁超构材料的设计与性质研究

项目名称： 近零参数电磁超构材料的设计与性质研究

项目编号： No.11204195

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 须萍

作者单位： 苏州大学

项目金额： 25万元

中文摘要： 近零参数电磁超构材料是近来国际上的一个新兴的研究热点。本项目我们将深入地研究复杂缺陷对材料透射性质的影响、非局域效应、截断的结构的表面上的微结构等对近零参数电磁超构材料的影响。在此基础上，我们将金属的吸收损耗以及表面等离激元带来的非局域效应考虑在内，发展改进有效介质理论，力图更精准地计算出其有效介质参数，来帮助我们设计构建近零参数超构材料的实际结构。我们还将考虑设计基于电介质光子晶体的近零参数超构材料，有望突破以往金属超构材料高损耗长波段的局限，我们将采用多重散射和有限元方法来研究这种新型近零参数超构材料在波导、波前控制等方面的应用以及空间反演对称和时间反演对称破缺所导致的新颖的物理现象。对于近零参数电磁超构材料的研究尚处于比较初级的阶段，仍有不少有待探索的有趣的物理现象。通过本项目的研究将丰富和深化对该领域物理的理解，有望设计出具有实用价值的低损耗近零参数超构材料。

中文关键词： 超材料；近零折射率；近零介电常数；近零磁导率；非局域

英文摘要： Metamaterials have attracted extensive attention due to their interesting physics and numerous innovative applications in negative refraction, perfect lens, cloaking and so on. Besides the single-negative and the double-negative parameters, single-zero and double-zero parameters can also be obtained in the metamaterials. In the metamaterials with near-zero parameters, the effective wavelength of the electromagnetic wave tends to be infinite. That is, in such materials with finite size the phase is almost unchanged. Based on these unique properties, many intriguing optical devices have been proposed. In this research we will investigate how the complicated defects, loss effect, nonlocal effect and the nanostructure at the surfaces influence the properties of near-zero-parameter metamaterials. In addition, we will develop new effective medium theories to give more accurate effective parameters. Moreover, dielectric photonic crystals will be taken into consideration, which may have potential abilities to realize lossless near-zero-parameter metamaterials. Thus, we can break through some limitations caused by the metal dissipation. Using multiple scattering theory and finite element method simulations we will explore new applications in waveguides, controlling the wave front, etc. What's more, we are also interested

英文关键词： metamaterials；near-zero-index；near-zero-permittivity；near-zero-permeability；nonlocality