Metasurface‐Enabled Dual‐Channel Single‐Pixel Polarimetric Imaging

Abstract Single‐pixel imaging has garnered significant interest across a variety of research domains due to its cost‐effectiveness and adaptability. Metasurfaces, with their subwavelength‐scale structures, offer flexible control ability, enabling them to be an ideal platform for single‐pixel imaging applications. This study introduces an innovative single‐pixel imaging technique that leverages polarization multiplexing metasurfaces to enable dual orthogonal polarization channel imaging from a single measurement. By incorporating four units with varying structural dimensions, 2‐bit encoding of the incident light is achieved. Through spatial shifting, images corresponding to different polarization channels with various spatial amplitude masks are encoded independently, resulting in high‐quality single‐pixel imaging. This multifunctional metasurface streamlines conventional polarization‐based single‐pixel systems, reducing both time and spatial costs with a single measurement, while achieving a spatial resolution of 4.38 µm in reconstructed images. This innovative approach to polarimetric single‐pixel imaging holds great potential for optical detection, target recognition, aviation, and other advanced applications.