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.
Received: 25 January 2016
Revised: 04 March 2016
Accepted manuscript online:
PACS:
81.05.Xj
(Metamaterials for chiral, bianisotropic and other complex media)
Fund: Project supported by the China Postdoctoral Science Foundation (Grant No. 2015M580849) and the National Natural Science Foundation of China (Grant Nos. 61471292, 61501365, 61471388, 61331005, 41404095, and 41390454).
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