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Excitation of anti-symmetric coupled spoof SPPs in 3D SIS waveguides based on coupling |
Li-li Tian(田莉莉)1, Yang Chen(陈杨)2, Jian-long Liu(刘建龙)1, Kai Guo(郭凯)1, Ke-ya Zhou(周可雅)1, Yang Gao(高扬)3, Shu-tian Liu(刘树田)1 |
1 Department of Physics, Harbin Institute of Technology, Harbin 150001, China; 2 School of Electrical Enginnering & Information, Northeast Petroleum University, Daqing 163318, China; 3 College of Electronic Engineering, Heilongjiang University, Harbin 150080, China |
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Abstract According to the electromagnetic field distributions, there exist two kinds of coupled spoof surface plasmon polaritons (SSPPs), the symmetric and anti-symmetric modes, in the three-dimensional (3D) subwavelength spoof-insulator-spoof (SIS) waveguide. We study the dispersion and excitation of the two kinds of coupled SSPPs supported by the 3D SIS waveguide. The evolution of the dispersion with the thickness and gap width of the waveguide is numerically investigated, and we give a theoretical analysis according to the coupling mechanism. Specially, based on the coupling mechanism, we design a zipper structure, through which the excitation and propagation of the anti-symmetric coupled modes can be realized effectively.
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Received: 22 January 2016
Revised: 07 March 2016
Accepted manuscript online:
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PACS:
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84.40.Az
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(Waveguides, transmission lines, striplines)
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73.40.Rw
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(Metal-insulator-metal structures)
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84.60.Bk
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(Performance characteristics of energy conversion systems; figure of merit)
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75.40.Mg
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(Numerical simulation studies)
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Fund: Project supported by the National Basic Research Program of China (Grant No. 2013CBA01702) and the National Natural Science Foundation of China (Grant Nos. 61377016, 61575055, 10974039, 61307072, 61308017, and 61405056). |
Corresponding Authors:
Shu-tian Liu
E-mail: stliu@hit.edu.cn
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Cite this article:
Li-li Tian(田莉莉), Yang Chen(陈杨), Jian-long Liu(刘建龙), Kai Guo(郭凯), Ke-ya Zhou(周可雅), Yang Gao(高扬), Shu-tian Liu(刘树田) Excitation of anti-symmetric coupled spoof SPPs in 3D SIS waveguides based on coupling 2016 Chin. Phys. B 25 078401
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