Nine‐Channel Jones Matrix Modulation via a Single‐Layer Coherent Pixel Metasurface

ABSTRACT The information capacity of a single‐layer metasurface has been fundamentally capped by the 6 degrees of freedom (DOFs) inherent in a single Jones matrix. Here, we transcend this channel limit by introducing a dielectric metasurface platform based on coherent multi‐nanobrick pixels. By exploiting angular multiplexing, our architecture decouples the modulation of light at different incident angles, enabling independent control over an unprecedented nine information channels. This allows for the arbitrary synthesis of distinct Jones matrix functionalities within a single, monolithic device. As a compelling demonstration, we experimentally realize the simultaneous encoding of three nanoprinted images and six holograms, each independently addressed by specific input polarizations and angles. Our work redefines the capacity of planar optics, paving the way for ultra‐high‐density data storage and highly integrated multifunctional optical systems.