|
Statut |
Confirmé |
|
Série |
SEM-EXCEP |
|
Domaines |
cond-mat |
|
Date |
Jeudi 5 Fevrier 2026 |
|
Heure |
14:00 |
|
Institut |
ESPCI |
|
Salle |
Room Charpak, entrance building, ground floor, 10 rue Vauquelin, Paris |
|
Nom de l'orateur |
Laplace |
|
Prenom de l'orateur |
Yannis |
|
Addresse email de l'orateur |
|
|
Institution de l'orateur |
Laboratoire des solides irradiés, Ecole Polytechnique, Palaiseau, France |
|
Titre |
Surface plasmonic cavities at Terahertz frequencies: ultrasmall, chiral and more |
|
Résumé |
I will present our work on the development of cavities and metamaterials operating in the Terahertz (THz) frequency range, using a surface plasmonic mechanism for light confinement. This approach enables the confinement of THz photons to volumes up to $10^{-8}$; times smaller than the free-space diffraction limit [1]. In this extreme regime, the cavities approach the ultimate spatial scale permitted by plasmonics, where novel phenomena such as nonlocal light–matter interactions begin to emerge. I will discuss how the broad tunability of THz surface plasmons through external parameters enables advanced engineering of the cavity fields, including the realization of chiral fields [2] and temporally engineered cavity fields, demonstrated through the recent realization of a photonic time crystal [3]. Overall, the plasmonic metamaterial approach offers a versatile route to synthesizing free-space and cavity fields at THz frequencies with full control over their spatial, temporal, and spin–orbit degrees of freedom.
[1] I. Aupiais et al. Nature Communications, 14(1), 2023.
[2] I. Aupiais et al. ACS Photonics, 11(10), 2024.
[3] T. Guo et al. arXiv 2510.02845
|
|
Numéro de preprint arXiv |
|
|
Commentaires |
Zoom link available at seminaires-lpem@espci.fr |
|
Fichiers attachés |
|
