金属材料特性对微纳金属光栅异常透射现象的影响  

Influence of material properties on extraordinary optical transmission through nano-metal grating

作　　者：胡瑞[1] 梁瑜章[1] 李丽霞[1] 彭伟[1] 

机构地区：[1]大连理工大学物理与光电工程学院,大连116024

出　　处：《中国科技论文》2016年第5期502-507,共6页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20120041110040);国家自然科学基金资助项目(61137005)

摘　　要：为了研究金属材料特性对金属光栅中异常透射现象的影响,使用时域有限差分法,分析了以Drude-Lorentz模型为色散关系理论模型的各种贵金属(Ag、Au、Cu)、非贵金属材料(Cr、Ni、W)及金属Al的材料特性对一维金属光栅的异常透射现象的影响。数值分析发现:Ag、Au、Cu等贵金属光栅相比于Cr、Ni、W等非贵金属光栅,在结构参数相同的条件下,由于较大的有效缝宽度和较小的吸收,表现出极高的透射峰值。To study the effect of metallic material properties on the extraordinary optical transmission in the micro-nano metal gratings,by using finite difference time domain method,we analyzed the influence of material properties of precious metals（Ag,Au,Cu）and non-preciou metals（Cr,Ni,W）whose dispersion relations were Drude-lorentz model on the extraordinary optical transmission in one dimensional metallic gratings.Numerical results show that Ag,Au,Cu show even larger transmittance peaks due to both a largr effective slits area and smaller absorption with the same parameters;In the case of Ni and Cr,the transmittance is much smaller due to the absorption.

关 键 词：表面等离子体 微纳结构 异常透射增强 

分 类 号：O436[机械工程—光学工程]