Naked-eye viewable 3D metasurface holographic movie made of silicon nitride.

We present the design, fabrication, and experimental demonstration of a large-area, high-transmittance metasurface hologram capable of reconstructing naked-eye-viewable 3D images and dynamic holographic movies. Our approach employs electron beam lithography using the character projection (CP) method to realize rapid, large-area nanopatterning of SiN-based meta-atoms, enabling a device area exceeding previous metasurface holography demonstrations. The metasurface exhibits high optical transmittance of up to 79 % at the wavelength of 532 nm. Furthermore, we demonstrate a holographic movie consisting of eight frames arranging an array of metasurface holograms, achieving a playback speed of 2.8 frames per second. The reconstructed objects exhibit a large size to be resolved with the naked eye, and wide viewing angles without the need for additional magnifying or projection optics. This work advances the development of compact, lightweight, and practical 3D displays, paving the way for dynamic holographic applications and next-generation augmented reality systems.