Ultra-high-capacity full-vectorial meta-holography

Vectorial metasurface holography is a powerful technique that relies on full-dimensional modulation of optical fields to realize its full potential, laying the foundation for encoding vast amounts of optical information and enhancing optical encryption. However, current methods for achieving such modulation remain challenging, as they typically require tuning multiple structural parameters or employing multilayer metasurfaces to provide sufficient degrees of control. Here, we propose a broadband full-vectorial meta-holography (BFVM) strategy based on a purely dielectric geometric-phase metasurface, which achieves complete control over the amplitude, phase, inhomogeneous polarization, and position of light solely by varying the rotation angles of the meta-units. This approach not only enables the generation of full-vectorial holographic images with complete Stokes polarization distributions, but also supports the creation of up to 50 distinct, ultra-high-capacity vectorial holograms, each encoding a designed polarization structure with spatial variation. These structured polarization states can serve as a previously overlooked degree of freedom for enhancing holographic storage. This advancement expands the frontier of vectorial holography, paving the way for next-generation full-vectorial beam shaping, full-color holographic displays, and immersive AR/VR technologies.