진학프로석·박사 채용 접수 플랫폼

Context : All-dielectric optical nanostructures and metasurfaces are efficient tools for tailoring light properties since they exhibit weak optical losses and can host optical resonances. They have been successfully developed for yielding structural colors, non-linear optical responses, specific spectral responses…Their numerical design and optimization turns out to be of the highest importance for achieving the targeted optical performances. 

Mission: The main objective of this work is to implement inverse design methods to develop all-dielectric Mie-Resonant metasurfaces with precise and specific spectral responses. This inverse method can be coupled with numerical methods that have been developed into the research group. The group has developed several numerical codes based on FMM, RCWA and FEM. 

Activities: A particular attention will be brought on the singularities in the complex frequency plane of the scattering matrix elements of the metasurface. The spectral response of the metasurface will be optimized and analyzed in the framework of the singularity expansion method. A major objective of this work will be to develop an inverse design method on the basis of the singularities of the scattering elements in the complex frequency plane. The analysis of the spectral response in terms of discrete singularities in the complex frequency plane will bring a novel approach for defining the optical metasurfaces achieving the specific spectral response. 

Hosting laboratory: The project will be carried out at the Institut Fresnel, Marseille, France, https://www.fresnel.fr/ within the Clarte team. The Clarte group of the Fresnel Institut has a strong expertise in the development of electromagnetic numerical methods and in the design and analysis of optical components and nanostructures. In this project, one aims at modeling, designing and analyzing Mie-resonant metasurfaces with very particular spectral features and optical metasurfaces. Institut Fresnel (about 200 persons in total) is a research laboratory associated to Aix-Marseille Université, CNRS and Centrale Méditerranée, located on the Campus Saint-Jérôme in Marseille.

Keywords: Computational photonics; Singularities; Poles and Zeros; Resonant Light Scattering; Metasurfaces; Inverse Design.

References :

N. Bonod, P. Brianceau, J. Daurios, S. Grosjean, N. Roquin, J.-F. Gleyze, L. Lamaignère, J. Néauport, “Linear-to-Circular Polarization Conversion with Full-Silica Meta-Optics to Reduce Nonlinear Effects in High-Energy Lasers,” Nature Commun. 14, 5383 (2023)

I. Ben Soltane, R. Colom, F. Dierrick, B. Stout, N. Bonod, “Multiple-Order Singularity Expansion Method,” New J. Phys. 25, 103022 (2023)

I. Ben Soltane, F. Dierick, B. Stout, N. Bonod, “Generalized Drude-Lorentz Model Complying with the Singularity Expansion Method,” Adv. Optical Mater. 12, 2400093 (2024) 

I. Ben Soltane, N. Bonod, “Extracting Complete Resonance Characteristics From the Phase of Optical Signals,” arXiv (2025)