Metagratings Beyond Beam Manipulation
2020
We present extensions of the metagrating (MG) synthesis approach to tackle a wide variety of problems in configurations other than the typical free-space diffraction engineering scenarios. It is shown that an adapted semianalytical methodology allows the design of sparse constellations of subwavelength scatterers facilitating mode conversion and seamless bending in waveguides, directive sparse antenna arrays, and formation of near-field subwavelength hot spots. These results reveal the merits of MG-inspired devices for a broad range of applications.
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