Fig. 1: Operation of the proposed asymmetric wavefront generation metasurface.
From: Optical spin-symmetry breaking for high-efficiency directional helicity-multiplexed metaholograms
Right circularly polarized light incident from the a backward direction and b forward direction on a hydrogenated amorphous silicon (a-Si:H) metasurface. A single metasurface can produce two holographic images (the logo of POSTECH or Information Technology University “ITU”) depending on the propagation direction (see supplementary video part c).
