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2014-11-04 - Colloque/Article dans les actes avec comité de lecture - Anglais - 4 page(s)

Rosolen Gilles , Maes Bjorn , "Graphene doping inhomogeneities: plasmonic taper applications" in 19th annual Symposium of the IEEE Photonics Society Benelux Chapter, 978-90-365-3778-0, 35-38, Twente (Enschede), Pays-Bas, 2014

  • 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)
Texte intégral :

Abstract(s) :

(Anglais) Combining plasmonics and graphene is a new promising application for optoelectronic circuits since graphene supports low-loss plasmons and is tunable via doping. Therefore, a study of these graphene plasmons with various doping profiles is proposed. We show that the reflection at abrupt doping interfaces is a simple function of the doping difference. Improved transmission is obtained with a tapered interface and an optimal size for the transition zone is found. Finally, localized inhomogeneities are considered. A Fabry-Perot cavity leading to an absorption above 60% is described and a 6nm length cavity achieving 100% absorption is proposed. These results may lead to novel optical switches or nano-sensors.