Realistic Dynamic Metasurface 3D Holographic Display by Arbitrary Space-Selection via Wavefront Shaping

Metasurface 3D holographic display faces significant challenges in achieving realistic and dynamic presentation, due to the non-uniform intensity distribution of the excited laser and the complexity of actively driving the metasurface. Herein, a realistic broadband dynamic metasurface 3D holographic display is realized through a flat-top beam by dynamic wavefront shaping and active driving of a full-space multiplex metasurface. By using a digital micromirror device (DMD) as the dynamic modulation source, the incident Gaussian light is transformed into a flat-top beam with high uniformity, customizable spot shapes, and enhanced propagation distance. The realistic broadband holographic display is achieved by illuminating the metasurface with the shaped flat-top beam. Furthermore, the meticulously designed metasurface enables the simultaneous multiplexing of the X-Y plane and the Z-depth, thereby enhancing the hologram's loading capacity. Through the pixelated amplitude modulation of DMD, multiple subset flat-top beams are generated, enabling rapid and precise arbitrary space-selection for dynamic modulation of metasurface holographic display. This approach realizes a realistic broadband dynamic metasurface 3D holographic display. This investigation into enhancing the metasurface holographic display performance will expedite the adoption of holography in intelligent displays, digital imaging, and precision processing.