Angle‐Insensitive Broadband Multispectro‐Polarimetric Encoding Based on Inverse Design of Mosaic Metasurfaces

Abstract Multimodal optical information detection allows precise characterization of light‐matter interactions. Current multimodal optical detection systems often encounter challenges such as low spectral resolution, limited polarization sensitivity, or bulky designs that impede seamless integration. Here, a broadband multispectro‐polarimetric filter (BMSPF) metasurface array enables simultaneous spectral is proposed and full‐Stokes polarimetric imaging in a single snapshot. By combining Metal‐Insulator‐Metal (MIM) metasurfaces with a mosaic optimization design, angle‐robust multispectro‐polarimetric encoding under a 30° field‐of‐view is achieved. The encoded grayscale information is captured via a monochrome image sensor and decoded using a neural network. Operating across the visible‐to‐ near‐infrared range (400–1100 nm), the system attains an impressive spectral resolution of 6 nm. This method expands the application scenarios of multispectro‐polarimetric imaging and provides a pathway for the manufacturability of metasurface devices.