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

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.