Multi-resonant metasurfaces for wavefront control and hyperspectral imaging

We present a multi-resonant metasurface platform that integrates subwavelength meta-atoms with a distributed Bragg reflector (DBR), enabling multiple high-Q resonances from visible to near-infrared wavelengths. This platform supports broadband wavefront control for structural color generation, vectorial holography, and optical encryption, while also enabling compact hyperspectral imaging via an off-axis focusing meta-mirror. Using a convex/deep (CODE) learning algorithm, we reconstruct high-fidelity hyperspectral images from minimal data. This unified approach advances metasurface applications in optical modulation, imaging, and secure communication.