A thermally reconfigurable VO 2 metasurface for independent four-channel holographic imaging in the terahertz range

reverts to its insulating state. In this state, the metasurface produces digital holograms of "1" in the LCP channel and "2" in the RCP channel. The proposed metasurface demonstrates excellent wavefront control performance within a broad frequency range of 0.8-1.2 THz.