Chiral Metasurfaces with Decoupled Intensity‐Phase Control for Multifunctional Optical Security and Holographic Displays

Abstract Simultaneous and independent control of light's intensity and phase remains a critical challenge for multifunctional metasurfaces, as conventional designs suffer from inherent parameter correlations and orientation‐dependent limitations. Here, a minimalist chiral metasurface platform is proposed, achieving complete decoupling of intensity and phase modulation through a paradigm‐shifting meta‐atom design. Each chiral unit functions as a polarization‐sensitive optical rotator, circumventing the orientation degeneracy constraints of Malus' law while enabling arbitrary Pancharatnam‐Berry phase imprinting. This unique mechanism allows single‐layer integration of dual functionalities: polarization‐encoded grayscale nanoprinting and broadband wavefront shaping (e.g., holography or vortex generation). Experimental demonstrations validate the non‐interfering operation of both functionalities within a unified metasurface architecture. The minimalist design paradigm provides a scalable route toward ultra‐compact optical devices for augmented reality displays and anti‐counterfeiting applications, significantly advancing the frontier of multifunctional meta‐optics.