期刊
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
卷 65, 期 12, 页码 3086-3091出版社
WILEY
DOI: 10.1002/mop.33831
关键词
complementary periodic structure; dispersion characteristics; negative group velocity; spoof surface plasmon polaritons
This paper investigates noncoplanar dentate complementary structure units to achieve mode splitting in spoof surface plasmon polaritons (SSPPs). The mode on the high-frequency side exhibits negative group velocity (NGV) near the cutoff frequency. The symmetry of the complementary structure can be manipulated to control the dispersion characteristics of NGV modes. It is confirmed that the actual transmission wave in the SSPP waveguide is the superposition result of the two split-mode wave components.
Periodically patterned conductor surfaces can transmit electromagnetic modes similar to surface plasmon polaritons, which are called spoof surface plasmon polaritons (SSPPs). In this paper, noncoplanar dentate complementary structure units are proposed. In this case, the fundamental SSPP is split into two modes, of which the mode in the high-frequency side exhibits negative group velocity (NGV) near the cutoff frequency. The dispersion characteristics of NGV modes can be controlled by manipulating the symmetry of the complementary structure. It is confirmed that the actual transmission wave in the SSPP waveguide is the superposition result of the two split-mode wave components.
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