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When developing a metasurface, researchers commonly consider the subwavelength condition in real space, but this limits functionality. This study proposes four guidelines for designing an arbitrary metasurface in m00exo00exm00exe00exn00ext00exu00exm s00exp00exa00exc00exe. As illustrations, three lenses with exotic properties are detailed. This methodology offers a wide platform for engineering tailored multifunctional metasurfaces, thus broadening the application of artificial nanostructures in optical, acoustic, and mechanical metamaterials.
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