Metasurface-empowered snapshot hyperspectral imaging with convex/deep (CODE) small-data learning theory

Design of multi-resonant meta-atom for multi-wavelength off-axis focusing meta-mirror

The main idea for constructing a multispectral image of a color object without involving filters is utilizing a multi-resonant meta-atom as the metasurface building block. We incorporate an Al nano-rod with a particularly designed distributed Bragg reflector (DBR) to realize a multi-resonant meta-atom. Details of the DBR substrate can be found in the Supplementary Table 1. The anisotropic shape of the Al nano-rod can satisfy the geometric phase condition^27,28, while the combination of plasmonic…