Amplitude‐Matrix‐Aided Meta‐Cloak for Complex Environments

Abstract For millennia, the invisibility cloak has been a sought‐after goal, increasingly pursued with the advent of metamaterials. Current metasurface cloaks (meta‐cloaks) are limited to specific conditions, such as a perfect electrical conductor (PEC) or air background. Achieving invisibility in complex natural environments remains challenging due to the difficulty in matching the cloak’s scattering amplitude with its surroundings. Here, we propose an amplitude‐matrix‐aided meta‐cloak that uses a conformal metasurface to replicate environmental scattering, rendering an object undetectable in arbitrary backgrounds. As proof of concept, we demonstrate this cloak in a grassland setting via near‐ and far‐field experiments. By sampling the background’s amplitude distribution and comparing it with the target vehicle’s response, a spatial amplitude matrix is constructed to prescribe pixel‐level reflection compensation. This eliminates the object‐environment mismatch, enabling seamless integration verified by a structural similarity index measure (SSIM) exceeding 0.93. This work presents the first experimental realization of an amplitude‐matrix‐based meta‐cloak, advancing toward broadband, conformally adaptable cloaking that perceptually assimilates with natural environments.