Scattering by a metasurface with resonant Mie particles under TM/TE polarization

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• Kim Pham (ENSTA ParisTech)
• Friday 24 March 2023, 14:00-14:30
• Seminar Room 1, Newton Institute.

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MWSW02 - Theory of wave scattering in complex and random media

The theory of surface homogenization aims at replacing subwavelength metasurfaces consisting of a periodic arrangement of particles by effective transition conditions. In this work, we extend this framework to the case of electromagnetic metasurfaces consisting of a periodic collection of subwavelength resonant Mie particles. These particles exhibit a strong contrast in their permittivity properties and produce subwavelength resonances that are a key ingredient for wave manipulation by metasurface. We show that Mie scattering can be accounted for in the homogenized model by frequency-dependent effective parameters using a two-scale homogenization approach combined with a matched asymptotic analysis. We study in particular the cases of TE and TM polarizations which surprisingly require a different theoretical treatment. We validate our approach by comparing the semi-analytical results provided by the effective model with direct numerical simulations. 

This talk is part of the Isaac Newton Institute Seminar Series series.

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