Terahertz plasmons and magnetoplasmons in graphene – Hugen Yan

Date: Mon. December 3rd, 2012, 12:30 pm-1:30 pm
Location: Rockefeller 221

Plasmons in metal surfaces and clusters have been extensively studied due to their potential applications in sensing, imaging, light harvesting and optical metamaterials. Graphene is a semimetal with tunable conductivity and hence can support plasmons as well. In addition to the tunability, graphene plasmons have relatively weak damping due to the high carrier mobility. In this talk, I will present our recent progress on the plasmon excitations in graphene micro-structures and their behavior in an external high magnetic field. We demonstrated graphene plasmonic terahertz filters and polarizers with graphene/insulator stacks and revealed the unique properties of Dirac plasmons with and without a magnetic field. Our study paves the way for graphene applications in terahertz photonics and optoelectronics.