Polarization‐Multiplexed Silicon Metasurfaces for Multi‐Channel Visible Light Modulation.

All‐dielectric metasurfaces with low‐loss planar photonic subwavelength elements can be freely designed to realize high‐efficiency light wave manipulation. It is highly desirable to achieve multifunctionalities with a single metasurface to further enrich the manipulation of light with metasurfaces for diverse applications. This article demonstrates multifunctional silicon‐based metasurfaces capable of generating versatile wavefronts under different polarization light incidence at visible wavelengths. The polarization‐multiplexed metasurfaces are implemented with rationally arranged anisotropic silicon nanobricks to achieve independent control of orthogonal linearly polarized light waves for multi‐channel functionalities, including polarized beam splitting, opposite charged and different ordered optical vortexes. The polarization‐multiplexed high‐quality silicon metasurfaces have great potential for applications in multi‐channel optical devices with integrated functionality. [ABSTRACT FROM AUTHOR]