Plasmonic Hot Spots in Triangular Tapered Graphene Microcrystals

Author(s): Rodin, AS; Fei, Z; McLeod, AS; Wagner, M; Neto, AHC; Fogler, MM; Basov, DN | Abstract: Recently, plasmons in graphene have been observed experimentally using scattering scanning near-field optical microscopy. In this paper, we develop a simplified analytical approach to describe the behavior in triangular samples. Replacing Coulomb interaction by a short-range one reduces the problem to a Helmholtz equation, amenable to analytical treatment. We demonstrate that even with our simplifications, the system still exhibits the key features seen in the experiment.