Evolution of Fano resonance based on symmetric/asymmetric plasmonic waveguide system and its application in nanosensor

被引：35
|
作者：
Zhang, Yunyun [1 ,2 ]
Li, Shilei [1 ,2 ]
Zhang, Xinyuan [1 ,2 ]
Chen, Yuanyuan [1 ,2 ]
Wang, Lulu [1 ,2 ]
Zhang, Yong [1 ,2 ]
Yu, Li [1 ,2 ]
机构：
[1] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
[2] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2016年 / 370卷
基金：
中国国家自然科学基金;
关键词：
Surface plasmon polaritons; Plasmonic waveguide; Fano resonance; Sensor; ULTRA-HIGH FIGURE; INDUCED TRANSPARENCY; DEMULTIPLEXERS; TRANSMISSION; COMPACT; FILTERS;
D O I：
10.1016/j.optcom.2016.03.001
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We proposed a plasmonic nanosensor based on Fano resonance in the symmetric and asymmetric plasmonic waveguide system, which comprises with a rectangular cavity and two slot cavities with the metal-dielectric-metal waveguide. Simulation results show that by symmetric/asymmetry rectangular cavity and regulating the rectangular cavity coupling with slot cavities, different waveguide modes can be excited. Due to the interaction of the waveguide mode, the transmission spectra possess single, double or multiple sharp asymmetrical profiles. Because of the different origins, these Fano resonances exhibit different dependence on the parameters of the structure and can be easily tuned. These characteristics offer flexibility to design the device. This nanosensor yields a sensitivity of 800 nm/RIU and a figure of merit of about similar to 1.35 x 10(4), which can find widely applications in the plasmonic nano-sensing area. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：203 / 208
页数：6
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