Paper 14110-9
Paper 14110-9
Modeling the angular scattering response of substrated metasurfaces (Invited Paper)
15 April 2026 • 13:50 - 14:20 CEST | Madrid 1/Salon 3 (Niveau/Level 0)
Abstract
Metasurfaces enable powerful control of electromagnetic waves, supporting a large variety of applications relevant to the optics community. However, controlling their angular scattering response remains challenging due to the difficulty of achieving angular control with thin films and the absence of accurate modeling tools. Existing techniques cannot simultaneously handle different substrate/superstrate media and higher-order multipolar responses, which are common in dielectric optical metasurfaces. We present a rigorous modeling approach based on generalized sheet transition conditions that incorporates both effects and accurately predicts angular scattering. We demonstrate its use for designing metasurface angular filters that can replace optical 4f systems.
Presenter
Karim Achouri
EPFL (Switzerland)
Karim Achouri received his BSc in microengineering and his MSc in photonics and applied optics, as well as a minor in space technologies, from the Swiss Federal Institute of Technology in Lausanne (EPFL), Switzerland, in 2010 and 2012, respectively. In 2013, he joined the Polygrames research center at the Ecole Polytechnique de Montréal, Canada, where he completed a PhD degree in electromagnetics in 2017. His research interests are in the areas of electromagnetics, metamaterials, applied optics, photonics and nanotechnologies. In 2017, he joined the Nanophotonics and Metrology Laboratory (NAM) at EPFL as a postdoctoral fellow, where he worked on the mathematical synthesis, the numerical analysis and the practical realization of optical metasurfaces. Since 2024, he is an Assistant Professor at EPFL heading the Laboratory for advanced Electromagnetics and Photonics (LEAP), where he is pursing his work on modeling and designing thin optical devices for electromagnetic wave control.