DI-UMONS : Dépôt institutionnel de l’université de Mons

Recherche transversale
(titres de publication, de périodique et noms de colloque inclus)
2013-11-24 - Colloque/Présentation - poster - Anglais - 1 page(s)

Rivolta Nicolas , Maes Bjorn , "Shaping sub-wavelength plasmonic funnels" in 18th annual symposium of the IEEE-Photonics Society Benelux Chapter (IPS 2013), 978-90-386-3512-5, 143-146, Eindhoven, Pays-Bas, 2013

  • Codes CREF : Matériaux optiques (DI1256)
  • Unités de recherche UMONS : Matériaux Micro- et Nanophotoniques (S803)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
  • Centres UMONS : Physique des matériaux (CRPM)

Abstract(s) :

(Anglais) For ten years graphene has attracted a continuously growing interest due to its amazing electronic properties. This material is not only extremely thin, it also presents a tunable conductivity controlled by varying the doping level e.g. via electrostatic gating. More recently, graphene is under study for its curious optical properties. Graphene plasmons for example exhibit a relatively tight confinement and long lifetime, compared to noble metal plasmons. Moreover, at normal incidence 2.3 percent of the light is absorbed by the one atom thick layer! This remarkably strong and broadband interaction can be exploited in complex photonic structures such as modulators, metamaterials and optical sensors. Before examining complete devices, we need to study the fundamental modes in basic structures such as nano-ribbons, rings, disks, cavities etc. This is achieved by describing graphene through its dielectric function, determined via the conductivity within the random phase approximation. The numerical calculations are handled by COMSOL using the finite-element method. Once the basic structures are understood, we aim to model more complex and functional components such as photovoltaic cells, integrated components and light emitting devices.