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Metasurfaces present a potent platform to manipulate light by the spatial arrangement of sub‐wavelength patterns with well‐defined sizes and geometries, in thin films. Metasurfaces by definition are planar. However, it would be highly desirable to integrate metasurfaces with diverse, spatially programmed sub‐wavelength features into a 3D monolith, to manipulate light within a compact 3D space. Here,...
Metasurfaces are traditionally 2D metamaterials that manipulate light. In article number 2005454, Shu Yang and co‐workers bring them into 3D by photoengraving diverse metasurfaces onto different facets of monolithic, 3D microstructured arrays in a high‐throughput and on demand fashion. By patterning locally confined metasurfaces on a cube, each cube becomes a multiplexing pixel for color reflection...
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