[en] Since graphene supports low loss surface plasmon polaritons (SPPs) in the infrared range, we theoretically investigate the coupling of SPPs with nano-cavities. By using the finite-element method via COMSOL, we illustrate the SPP propagation in the graphene sheet. The resonant frequencies are observed by a deep in the reflection spectrum, and fully explained by the coupled mode theory. The shift of frequency is easily obtained by tuning the doping of graphene (tuning voltage in the graphene). We can reach quality factors up to 33 for cavities of 20 nm. This may path the way to ultra-compact optoelectronic devices.
Research center :
CRPM - Physique des matériaux
Disciplines :
Physics
Author, co-author :
Rosolen, Gilles ; Université de Mons > Faculté des Sciences > Matériaux Micro et Nanophotoniques
Maes, Bjorn ; Université de Mons > Faculté des Sciences > Matériaux Micro et Nanophotoniques
Language :
English
Title :
Graphene plasmonics: tunable coupling with nano-cavities
Publication date :
25 November 2013
Event name :
18th IEEE Photonics Benelux Chapter
Event place :
Eindhoven, Netherlands
Event date :
2013
Research unit :
S803 - Matériaux Micro- et Nanophotoniques
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
