1915/01/01 by Younes Ra’di, Younes Ra'di, Dimitrios L. Sounas +3 · 1 citation
Engineering · Materials Science · Physics and Astronomy · Social Sciences · #Advanced Antenna and Metasurface Technologies #Antenna Design and Analysis #Computer science #Deformable mirror #Environmental science #Fabrication #Metamaterials and Metasurfaces Applications #Optics #Physics #Social and Educational Sciences #Transformation (genetics) #Unitary transformation #Wavefront #physics.app-ph #physics.optics
paper · pdf · doi:10.1103/physrevlett.119.067404
published as Phys. Rev. Lett. 119, 067404 (2017) · 16 pages, 2 figures
openalex publication_date 1915/01/01 · arxiv created 2017/05/10 · arxiv updated 2017/08/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Graded metasurfaces exploit the local momentum imparted by an impedance gradient to mold the impinging wave front. This approach suffers from fundamental limits on the overall conversion efficiency, and it is challenged by fabrication limitations on the spatial resolution. Here, we introduce the concept of metagratings, formed by periodic arrays of carefully tailored bianisotropic inclusions and show that they enable wave front engineering with unitary efficiency and significantly lower fabrication demands. We employ this concept to design reflective metasurfaces for wave front steering without limitations on efficiency. A similar approach can be extended to transmitted beams and arbitrary wave front transformation, opening opportunities for highly efficient metasurfaces for extreme wave manipulation.