Polarization-insensitive unidirectional spoof surface plasmon polaritons coupling by gradient metasurface
Shi Hong-yu1, Zhang An-xue1, 2, †, , Chen Jian-zhong1, Wang Jia-fu3, Xia Song4, Xu Zhuo4
       

The normalized measured fields confined to the surface: (a) the measured z component of the electric field at parallel-polarized incidence; (b) the measured z component of the magnetic fields at normal-polarized incidence.