双介质加载石墨烯表面等离子激元波导的理论分析  

Theoretical Analysis of Double Dielectric Loaded Graphene Surface Plasmon Polariton

作　　者：李勇[1] 张惠芳[1] 范天馨 何英[1] 王燕[1] 白丽华[1] 

机构地区：[1]上海大学理学院物理系,上海200444

出　　处：《光学学报》2016年第7期281-288,共8页Acta Optica Sinica

基　　金：国家自然科学基金(11204170)

摘　　要：在介质加载石墨烯等离子激元波导的基础上设计了一种由两个高折射率介质条形成的双介质加载石墨烯表面等离子激元波导(DDLGSPPW)。采用有效折射率法和有限元法研究在DDLGSPPW中石墨烯表面等离子激元(GSPP)模的有效折射率随入射波长、介质条2的宽度、高度以及介电常数的变化规律。结果表明,通过改变DDLGSPPW的介质条2的参数来改变GSPP模的有效折射率和模式数目,并调节GSPP模在两个介质条中场分布情况,表现出的性质和四层介质平板波导的性质很相似。DDLGSPPW的这种性质使其有望在集成光学器件中产生新的应用价值。Based on the dielectric loaded graphene plasmon waveguide the double dielectric loaded graphene surface plasmon polariton waveguides（DDLGSPPW）is proposed using two refractive index dielectrics.The change rule of effective refractive indices of graphene surface plasmon polariton（GSPP）modes versus incident wavelength,width,height and dielectric constant of dielectric 2 in DDLGSPPW are studied,using the effective index method and the finite element method.The results show that the characters of the obtained and the four layer dielectric slab waveguide are similar,through changing the effective refractive indices and the modulus with the parameter of dielectric 2,and adjusting the distribution of the two dielectrics mode.The characters of DDLGSPPW may have new application value in the integrated optical devices.

关 键 词：表面光学 等离子激元 波导 有限元法 有效折射率法 石墨烯 

分 类 号：O436[机械工程—光学工程]