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Communication Dans Un Congrès Année : 2021

Sparse Metasurfaces: From Theory to Practical Implementations

Résumé

Metagratings demonstrate an exceptional efficiency in controlling diffraction patterns. Still, they are essentially periodic structures excited by a plane wave. This induces two main drawbacks. First, periodicity limits metagratings to the control of a discrete set of scattered plane waves, not a continuous one. Second, plane-wave-like illumination assumes that the source is placed in the far-field, significantly reducing feeding efficiency. Here, we elaborate on the analytical model of metagratings and show how numerical calculation of Green's functions can be employed to overcome these drawbacks and design sparse metasurfaces capable of creating arbitrary radiation patterns for arbitrary external excitations.
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Dates et versions

hal-03231252 , version 1 (20-05-2021)

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  • HAL Id : hal-03231252 , version 1

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Vladislav Popov, Thomas Lepetit, Fabrice Boust, Shah Nawaz Burokur. Sparse Metasurfaces: From Theory to Practical Implementations. EUCAP 2021, Mar 2021, Dusseldorf, Germany. ⟨hal-03231252⟩
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