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Reconfigurable metasurfaces for wave focusing

Published on:

6 November 2023

Primary Category:

Applied Physics

Paper Authors:

Theodosios D. Karamanos,

Mathias Fink,

Fabrice Lemoult

Bullets

Key Details

Proposes topology optimization to design reconfigurable metasurfaces for wave focusing

Models metasurface elements as point sources with binary phase shifts

Maximizes intensity at focus point by optimizing binary phase configuration

Applies method to focus waves in open space, leaky cavity, and cavity antenna

Infinite metasurface element interactions improve focusing over simpler models

Efficient optimization enabled by analytical or numerical 2D Green's functions

AI generated summary

Reconfigurable metasurfaces for wave focusing

This paper proposes using topology optimization to design reconfigurable metasurfaces that can focus waves in complex environments. The metasurface elements are modelled as point sources with tunable 0 or π phase shifts. The optimization maximizes intensity at a focus point by finding the optimal binary phase configuration. This method is applied to focus waves in open space, a leaky cavity, and a cavity antenna. Considering infinite interactions between metasurface elements significantly improves focusing over simpler models. Analytical or numerical calculation of 2D Green's functions enables efficient optimization.

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