功勋
金属绝缘体金属
折射率
等离子体子
材料科学
光学
金属
绝缘体(电)
纳米
光电子学
物理
量子力学
电压
冶金
电容器
作者
Xiang‐Tian Kong,Weiguo Yan,Zu-Bin Li,Jianguo Tian
出处
期刊:Optics Express
[The Optical Society]
日期:2012-05-14
卷期号:20 (11): 12133-12133
被引量:14
摘要
We theoretically study the plasmonic modes in metal-multi-insulator-metal (MMIM) waveguides. Two types of symmetric MMIM structures consisting of three insulators are investigated thoroughly. The effective refractive index, energy confinement, propagation length, and figure of merit are given in terms of geometric parameters. Due to the step index modulation, these properties of MMIM structures differ from the metal-insulator-metal (MIM) structure. Compared with the corresponding MIM structures, MMIM structures can possess either better energy confinement or larger propagation length, which depends on the geometric parameters and the index distribution. Propagation length of up to 10(3) µm and a figure of merit of up to 10(4) are observed for MMIM structure with core thickness of several hundred nanometers.
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