诺共振
功勋
光学
等离子体子
波导管
材料科学
法诺平面
光电子学
折射率
共振(粒子物理)
金属绝缘体金属
耦合模理论
光子学
电磁感应透明
物理
数学
电压
粒子物理学
纯数学
量子力学
电容器
作者
Jina Li,Jianfeng Chen,Xing Liu,He Tian,Jinfang Wang,Jingang Cui,Siti Rohimah
出处
期刊:Applied Optics
[Optica Publishing Group]
日期:2021-05-27
卷期号:60 (18): 5312-5312
被引量:37
摘要
A plasmonic metal-insulator-metal (MIM) waveguide system is proposed, which is composed of a symmetrical X-shaped resonant cavity and a bus waveguide with a baffle, and its Fano resonance and optical sensing characteristics are investigated by using the finite element method (FEM). The results show that the system allows easy implementation of up to four Fano resonances, and the maximum refractive index sensitivity and figure of merit are 1303 nm/RIU and 3113, respectively. The influences of the geometric parameters of the system on the Fano resonances are also investigated, and further the independent adjustments of the Fano resonance line shape and wavelength are realized. Moreover, when an additional X-shaped resonant cavity is added to the system, more ultrasharp Fano resonances with considerable performances are obtained, which may enhance the parallel processing capability of the system. The proposed plasmonic MIM waveguide system may have potential applications in integrated photonic devices and nanoscale optical sensing.
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