Excitation of anti-symmetric coupled spoof SPPs in 3D SIS waveguides based on coupling |
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| Affiliation: | 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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| Keywords: | waveguides surface plasmons microwave technology |
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