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Metamaterial band theory:fundamentals & applications

查看全文 作　　者：RAMAN Aaswath [1]Pattabhi;SHIN [1]Wonseok;FAN [1]ShanHui 高影响力作者 机构地区：[1]Ginzton Laboratory, Stanford University Stanford高影响力机构 出　　处：《Science China(Information Sciences)》索引2013年第56卷第12期,共14页高影响力期刊 基　　金：supported by AFOSR MURI Programs FA9550-12-1-0471 and FA9550-09-1-0704;by U.S.Department of Energy(Grant No.DE-FG02-07ER46426) 摘　　要：Remarkable progress has been made over the past decade in controlling light propagation and absorption in compact devices using nanophotonic structures and metamaterials.From sensing and modulation,to on-chip communication and light trapping for solar cells,new device applications and opportunities motivate the need for a rigorous understanding of the modal properties of metamaterials over a broad range of frequencies.In this review,we provide an overview of a metamaterial band theory we have developed that rigorously models the behavior of metamaterials made of dispersive materials such as metals.The theory extends traditional photonic band theory for periodic dielectric structures by coupling the mechanical motion of electrons in the metal directly to Maxwell’s equations.The solution for the band structures of metamaterials is then reduced to a standard matrix eigenvalue problem that nevertheless fully takes into account the dispersive properties of the constituent materials.As an application of the metamaterial band theory,we show that one can develop a perturbation formalism based on this theory to physically explain and predict the efect of dielectric refractive index modulation or metallic plasma frequency variation in metamaterials.Furthermore,the metamaterial band theory also provides an intuitive physical picture of the source of modal material loss,as well as a rigorous upper bound on the modal material loss rate of any plasmonic,metamaterial structure.This in turn places fundamental limits on the broadband operation of such devices for applications such as photodetection and absorption. 关 键 词：组成材料 能带理论 金属等离子体 麦克斯韦方程组 折射率调制 原理 模态特性 光子结构
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