Abstract
In this paper, a scheme of phase gradient metasurface (PGM) coupler was proposed to realize a high-efficiency spoof surface plasmon polariton (SSPP) excitation, and the excitation can be independently designed for two orthogonal linear polarized incident waves. Based on an anisotropic Jerusalem cross metasurface unit cell, the responses for orthogonal linear polarized incidence are affected by different structural parameters. The phase gradient can be designed independently for two orthogonal linear polarized incidences, and then the excitation of SSPPs can be designed independently for two orthogonal polarizations. As proof of the concept, two PGM couplers at 10 GHz were designed to couple the orthogonal linear polarized incidences into orthogonal directions and opposite directions, respectively. Both simulations and measurements demonstrate that the excitation of SSPPs under orthogonal polarizations can be designed independently.
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Acknowledgements
The authors are grateful to the support from the National Natural Science Foundation of China (Grant nos. 61671467 and 61331005), the Science and Technology Program of Shaanxi Province (2015KJXX-47). The work was partially supported by the State Key Laboratory of Millimeter Waves, Department of Radio Engineering, Southeast University.
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Meng, Y., Ma, H., Feng, M. et al. Independent excitation of spoof surface plasmon polaritons for orthogonal linear polarized incidences. Appl. Phys. A 124, 707 (2018). https://doi.org/10.1007/s00339-018-2090-7
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DOI: https://doi.org/10.1007/s00339-018-2090-7