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.