Probing the dielectric response of graphene via dual-band plasmonic nanoresonators - Xiao,Y; Francescato,Y; Giannini,V; Rahmani,M; Roschuk,TR; Gilbertson,AM; Sonnefraud,Y; Mattevi,C; Hong,M; Cohen,LF; Maier,SA (PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2013)