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Polarization-insensitive unidirectional spoof surface plasmon polaritons coupling by gradient metasurface |
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| Affiliation: | 1.School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China;2.Beijing Center for Mathematics and Information Interdisciplinary Science (BCMIIS), Beijing 100048, China;3.College of Science, Air Force Engineering University, Xi’an 710051, China;4.Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China |
| Abstract: | A polarization-insensitive unidirectional spoof surface plasmon polariton(SPP) coupler mediated by a gradient metasurface is proposed. The field distributions and average Poynting vector of the coupled spoof SPPs are analyzed. The simulated and experimental results support the theoretical analysis and indicate that the designed gradient metasurface can couple both the parallel-polarized and normally-polarized incident waves to the spoof SPPs propagating in the same direction at about 5 GHz. |
| Keywords: | spoof surface plasmon polariton metamaterials gradient metasurfaces |
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