Fig. 1: The concept of full-polarization cloaking.

a Schematic design of a metasurface cloak. b The schematic representation of full-polarization metasurface cloak. The arbitrary curved scatter is covered by a metasurface cloak. Under the incidence (purple arrows) of different polarizations, the wavefront (indicated by a triplet short line) can be reconstructed as if the wave experiences a specular reflection (black arrow) at a virtual ground plane. The red dashed line denotes the metasurface cloak at the boundary of scatter denoted by f(x, y); the black dashed line denotes the virtual ground denoted by g(x,y). c The Poincare sphere with different major polarizations denoted from i to v, corresponding to \(\left| {\sigma _ + } \right\rangle\), \(\left| {\sigma _y} \right\rangle\), \(\left| {\sigma _{\pi /4}} \right\rangle\), \(\left| {\sigma _x} \right\rangle\), and \(\left| {\sigma _ - } \right\rangle\), respectively. The near-field distributions represent the copolarized beam under the normal incidence of a trapezoid metasurface cloak with SOP from i to v and under the incidence of bare bump with SOP of \(\left| {\sigma _x} \right\rangle\), accordingly