Ultrawide Angle, Directional Spectrum Splitting with Visible‐Frequency Versatile Metasurfaces

A virtually flat metasurface is proposed and experimentally realized, which can split different visible-frequency light to completely different or even contrary directions with an ultrawide angular range (>90°). The phase gradients provided by the metasurface have been engineered to exhibit significant wavelength-selective features. The metasurface of mirror-symmetric arrays behaves as a convex, concave, and planar mirror for distinct light wavelengths. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.