Enlargement of the band gap in the metal-insulator-metal heterowaveguide

被引：3
|
作者：
Zhu, Qiaofen [1 ,2 ]
Wang, Dayong [2 ]
Zhang, Yan [1 ]
机构：
[1] Capital Normal Univ, Dept Phys, Key Lab Terahertz Optoelect, Beijing Key Lab Terahertz Spect & Imaging,Minist, Beijing 100048, Peoples R China
[2] Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2009年 / 282卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Surface plasmon polaritons; Band gap; Metal-insulator-metal heterowaveguide; LOCALIZATION;
D O I：
10.1016/j.optcom.2008.11.082
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a new metal-insulator-metal (MIM) heterowaveguide to enlarge the band gap, which is formed by alternately stacking two kinds of metals, modulating the MIM waveguide slit, and inserting different dielectric materials with the effective refractive index periodically modulated. Based on this structure, we adopt two different methods to enlarge the band gap: changing the thickness of the unit layer and combining two MIM structures. Both of them widen the band gap when surface plasmon polaritons propagate through the structure. This metal heterostructure is expected to have applications in surface plasmon polaritons (SPPs) based optical devices, such as filters, waveguides, especially for broad band gap elements. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：1116 / 1119
页数：4
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