Plasmonic-induced transparency of unsymmetrical grooves shaped metal–insulator–metal waveguide

The plasmonic waveguides with unsymmetrical grooves shaped metal-insulator–metal (MIM) structures are proposed in theory. For symmetrical and unsymmetrical groove structures, the transmission varies with the increasing of the groove depths and groove lengths. The filtering characteristics due to the...

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Published in:AIP advances 2014-12, Vol.4 (12), p.123006-123006-11
Main Authors: Wang, Jicheng, Sun, Lin, Hu, Zheng-Da, Liang, Xiuye, Liu, Cheng
Format: Article
Language:English
Subjects:
Filtration
Finite element method
Grooves
Group velocity
Insulators
Transmission lines
Waveguides
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cited_by cdi_FETCH-LOGICAL-c358t-d0adb658e8346a66c2d45dfb2d4532c129e1b5809e40ecb1cbeb5575e6ec70193
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description The plasmonic waveguides with unsymmetrical grooves shaped metal-insulator–metal (MIM) structures are proposed in theory. For symmetrical and unsymmetrical groove structures, the transmission varies with the increasing of the groove depths and groove lengths. The filtering characteristics due to the destructive interference of the plasmonic modes are found in those subwavelength structures. The transmission line theory is utilized to interpret the transmittance and filtering phenomena. The transmission formulas are also achieved by the transmission line theory. It is found that the slow light effects are emerged in the unsymmetrical groove structures. A small group velocity (c/80) can be achieved. Finite Element Method (FEM) is conducted to verify our design.
doi_str_mv 10.1063/1.4902506
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subjects Filtration
Finite element method
Grooves
Group velocity
Insulators
Transmission lines
Waveguides
title Plasmonic-induced transparency of unsymmetrical grooves shaped metal–insulator–metal waveguide
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