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SUMMARY:Scattering by a metasurface with resonant Mie particles under TM/T
 E polarization - Kim Pham (ENSTA ParisTech)
DTSTART:20230324T140000Z
DTEND:20230324T143000Z
UID:TALK195805@talks.cam.ac.uk
DESCRIPTION:The theory of surface homogenization aims at replacing subwave
 length metasurfaces consisting of a periodic arrangement of particles by e
 ffective transition conditions. In this work\, we extend this framework to
  the case of electromagnetic metasurfaces consisting of a periodic collect
 ion of subwavelength resonant Mie particles. These particles exhibit a str
 ong contrast in their permittivity properties and produce subwavelength re
 sonances that are a key ingredient for wave manipulation by metasurface. W
 e show that Mie scattering can be accounted for in the homogenized model b
 y frequency-dependent effective parameters using a two-scale homogenizatio
 n approach combined with a matched asymptotic analysis. We study in partic
 ular the cases of TE and TM polarizations which surprisingly require a dif
 ferent theoretical treatment. We validate our approach by comparing the se
 mi-analytical results provided by the effective model with direct numerica
 l simulations.&nbsp\;
LOCATION:Seminar Room 1\, Newton Institute
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