电磁波在等离子体超材料中的非线性传播特性  

Transmission Characteristics of Electromagnetic Wave in the Nonlinear Plasma Metamaterials

作　　者：刘少斌[1] 孔祥鲲[1] 戴燚[1] 卞博锐[1] 章海锋[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,南京210016

出　　处：《微波学报》2013年第5期86-99,共14页Journal of Microwaves

基　　金：教育部博士点基金(20123218110017);江苏省自然科学基金(BK2011727);航空科学基金(20121852030);南京航空航天大学博士学位论文创新与创优基金(BCXJ11-05)

摘　　要：从电磁波在等离子体超材料以及表面传播特点出发,主要论述了等离子体作为超材料的新颖特性,包含了类光子晶体特性、双稳态电磁传播特性和高次谐波激励特性等。推导了等离子体超材料介电常数和折射率的覆盖范围,由粒子输运的连续方程推导得到非线性介电常数的数学展开式,给出了用微等离子体实现非线性等离子体周期性材料的实验研究方案。研究发现利用等离子体掺杂缺陷模的方式可以实现非线性阈值的减小,同时利用非线性等离子体和双负材料结合的方式可以实现电磁波的非互易传播。此外,例举了该材料的几个应用,实现了一款微波隔离器的设计,预测了等离子体超材料在电磁领域的应用前景。In this article, starting from a fundamental understanding of electromagnetic wave propagation in and a- round plasmas, we review the new functions of plasmas as metamaterials, including a photonic-crystal-like behavior, the bist- ability behavior and the enhancement of high harmonic generation, by describing specific plasma structures. In addition, we survey some specific applications of such media and predict a feasible scientific expansion of this field in the near future. Plasma metamaterials dielectric constant and the refractive index are deduced. Meanwhile, the nonlinear dielectric constant mathematical expansion was derived from the continuity equation of particle transport. And the experiment research plan made up of nonlinear periodic micro-plasma is given. Our research results has proven that photonic muhilayers doped by un- magnetized plasma and coupled nonlinear defects strongly reduced and individually modulated bistability threshold values and a novel, compact and highly efficient electromagnetic wave isolator is theoretically investigated through nonlinear plasma al- teruated with matching metamaterials. In addition, we specifically illustrates several applications of this material, and com- plete the design of a microwave isolator, predicted the feasibility of plasma metamaterial application in the field of electromag- netic, and predict some future application.

关 键 词：等离子体光子晶体 超材料 非线性 

分 类 号：O451[理学—无线电物理] O53[理学—物理]