Youssef Jeyar

Aug 19, 2024 | link.aps.org | Minggang Luo |Laboratoire Charles Coulomb |Youssef Jeyar |Brahim Guizal

We investigate the near-field radiative heat transfer between a normally and/or laterally shifted nanoparticle and a planar fused silica slab coated with a strip graphene grating. For this study, we develop and use a scattering matrix approach derived from Fourier modal method augmented with local basis functions. We find that adding a graphene sheet coating on the slab can already enhance the heat flux by about 85%.

Jul 31, 2024 | link.aps.org | Youssef Jeyar |Laboratoire Charles Coulomb |Minggang Luo |Brahim Guizal

We study the Casimir-Lifshitz force (CLF) between a gold plate and a graphene-covered dielectric grating. Using a scattering matrix (S-matrix) approach derived from the Fourier modal method (FMM), we find a significant enhancement in the CLF as compared to a mere dielectric slab coated with graphene, over a wide range of temperatures. Additionally, we demonstrate that the CLF depends strongly on the chemical potential of graphene, with maximal effects observed at lower filling fractions.

Jun 12, 2024 | hal.science | Youssef Jeyar |Laboratoire Charles Coulomb |Mauro Antezza |Brahim Guizal

Electromagnetic scattering by a partially graphene-coated dielectric cylinder: Efficient computation and multiple plasmonic resonances Fichier principal PRE_107_025306_2023.pdf (2.44 Mo) Télécharger le fichier Origine Fichiers éditeurs autorisés sur une archive ouverte

Jun 11, 2024 | hal.science | Minggang Luo |Laboratoire Charles Coulomb |Youssef Jeyar |Brahim Guizal

Near-field radiative heat transfer between shifted graphene gratings Origine Fichiers éditeurs autorisés sur une archive ouverte

Sep 7, 2023 | link.aps.org | Youssef Jeyar |Laboratoire Charles Coulomb |Minggang Luo |Kevin Austry

We study the nonequilibrium Casimir-Lifshitz force between graphene-based parallel structures held at different temperatures and in the presence of an external thermal bath at a third temperature. The graphene conductivity, which is itself a function of temperature, as well as of chemical potential, allows us to tune in situ the Casimir-Lifshitz force. We explore different nonequilibrium configurations while considering different values of the graphene chemical potential.