Electric Control over 2D Dirac Plasmon Resonances in Topological Insulator Bi_2Se_3 in Proximity Contact with Graphene

摘要

Graphene and topological insulator (TI) host two-dimensional (2D) Dirac surface plasmon at the terahertz frequency range. We observed unconventional density-dependence of 2D topological Dirac plasmon upon in proximity to the monolayer graphene.