We develop a simple and reliable analytical model that allows describing the electromagnetic response of all-dielectric metasurfaces consisting of a single-layer array of high-permittivity spherical particles. By combining Mie theory with a bi-dimensional homogenization approach, we derive closed-form expressions of the electric and magnetic surface impedances exhibited by the metasurface and, thus, its reflection and transmission coefficients. The effectiveness of the proposed approach is validated through a set of full-wave simulations. The availability of the analytical model here developed allows a more in-depth understanding of the complex scattering response of these electromagnetic structures and enables the design of innovative devices operating throughout the whole electromagnetic spectrum, including, for example, unconventional reflectors for antennas, broadband optical mirrors, and highly efficient nanoantenna reflectarrays.

Monti, A., Alu, A., Toscano, A., Bilotti, F. (2020). Surface impedance modeling of all-dielectric metasurfaces. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 68(3), 1799-1811 [10.1109/TAP.2019.2951521].

Surface impedance modeling of all-dielectric metasurfaces

Monti A.;Alu A.;Toscano A.;Bilotti F.
2020-01-01

Abstract

We develop a simple and reliable analytical model that allows describing the electromagnetic response of all-dielectric metasurfaces consisting of a single-layer array of high-permittivity spherical particles. By combining Mie theory with a bi-dimensional homogenization approach, we derive closed-form expressions of the electric and magnetic surface impedances exhibited by the metasurface and, thus, its reflection and transmission coefficients. The effectiveness of the proposed approach is validated through a set of full-wave simulations. The availability of the analytical model here developed allows a more in-depth understanding of the complex scattering response of these electromagnetic structures and enables the design of innovative devices operating throughout the whole electromagnetic spectrum, including, for example, unconventional reflectors for antennas, broadband optical mirrors, and highly efficient nanoantenna reflectarrays.
2020
Monti, A., Alu, A., Toscano, A., Bilotti, F. (2020). Surface impedance modeling of all-dielectric metasurfaces. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 68(3), 1799-1811 [10.1109/TAP.2019.2951521].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/364076
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