Curved holography based on Ω-shaped conformal metasurfaces

Conformal metasurfaces can break the restrictions between the geometry of an object and its optical functionality and allow the scattering wavefronts to be modulated willingly. Here, it is demonstrated that adaptive conformal metasurfaces is composed of achiral mirror symmetry Ω -shaped gold antenna, which can be integrated on arbitrary substrate to achieve curved holography in the visible range (λ=450 nm). The underline modulation scheme of conformal metasurface relies on the Pancharatnam -Berry phase, which can be continuously controlled in each subwavelength unit cell by rotating the orientation angle of the antenna. Such conformal metasurfaces decorated on curved topological objects can be employed in various practical application such as curved lens focusing, invisibility cloaking, and security printing technologies.