View density enhancement in super multi-view display using polarization-multiplexed focal-shifted cylindrical metalens arrays

Super multi-view (SMV) display offers a promising solution for three-dimensional (3D) displays by projecting dense views directly into the single pupil. However, conventional SMV architectures face a trade-off between view density and spatial resolution for individual views. Here, we propose a view density enhancement method based on a polarization-multiplexed metasurface. The metasurface contains two sets of cylindrical lens array phase profiles with opposite lateral focal shifts under orthogonal polarization states. A proof-of-concept prototype was fabricated and characterized, and the experimental results demonstrate that the proposed device generates two groups of interleaved views and reduces the angular separation between adjacent views from 6° to 3°, thereby doubling the view density without compromising the spatial resolution of individual views. This work offers a promising strategy and compact route for view-density enhancement in advanced SMV displays.