In this work we study the modal characteristics of localized surface plasmons in graphene-
coated, circular cross-section wires. Localized surface plasmons are represented in terms of
cylindrical multipole partial waves characterized by discrete, complex frequencies that
depend on the size of the wire and can be dynamically tuned via a gate voltage. We
consider both intrinsically nonplasmonic wires and intrinsically plasmonic wires. In the first
case the localized surface plasmons are introduced by the graphene coating, whereas in the …