Ultra-thin single-layer transparent geometrical phase gradient metasurface and its application to high-gain circularly-polarized lens antenna
Li Tang-Jing†, 
, Liang Jian-Gang, Li Hai-Peng, Liu Ya-Qiao
, Liang Jian-Gang, Li Hai-Peng, Liu Ya-Qiao (a) Corresponding phase distribution and (b) GPGM.
