Diatomic Metasurface for Efficient Six‐Channel Modulation of Jones Matrix

Multi‐channel modulation of Jones matrix facilitates encoding a variety of different functions in metasurfaces. However, multiple channels are usually accompanied by a high system complexity and a low efficiency. Here, a compact and effective diatomic metasurface platform that can impose the six‐channel modulation of Jones matrix efficiently is proposed. The metasurface consists of two anisotropic nanopillars with exquisitely designed structural sizes and rotation angles with near‐unity transmission. To verify the methodology, the independent regulation of six Jones‐matrix channels is demonstrated, and three nanoprinting images and three holographic images are integrated into a single metasurface. Furthermore, by interleaving two diatomic meta‐atoms operating at two different wavelengths within a super‐pixel, the multiplexing capacity of the Jones matrix is extended to twelve channels, paving the way to a broader exploitation of multi‐functional optical devices in optical communications, data storage and encryption, and so on. A compact diatomic metasurface platform to realize efficient six‐channel modulation of Jones matrix is proposed. By exquisitely designing propagation and geometric phases of two anisotropic nanopillars with near‐unity transmission, the complex amplitudes of the three Jones‐matrix components can be independently controlled. This work reaches the upper limit of the ability of the single‐layer structure to modulate the Jones matrix.