Search

A kind of bi-reflective anisotropic metasurface has been proposed, which can manipulate the polarization states of the electromagnetic waves independently. The bi-reflective anisotropic metastufaces are made up of two mutually perpendicular I-shaped structures, which have capacities to control the vertical and horizontal polarizations by using each of I-shaped structures, respectively. Two typical devices of such reflective anisotropic metasurfaces have been proposed: polarization converters and polarization beam splitters. Polarization converters are designed by using homogenous anisotropic metasurfaces with thickness of λ0/10, which can transform a linearly polarized incident wave into a circularly polarized wave in a broad frequency band. Polarization beam splitters are designed by using gradient anisotropic metasurfaces with thickness of λ0/15, which can manipulate the vertical and horizontal polarizations to different directions independently. The full-wave simulated results of polarization converters and polarization beam splitters are calculated by using of CST, and good polarization conversion and splitting are clearly observed, which verify the capacities of such reflective anisotropic metasurfaces to manipulate the polarization states of electromagnetic waves. [ABSTRACT FROM AUTHOR]