Magnetic graphene metamaterial

Graphene has emerged as a novel plasmonic material with advantageous properties for metamaterial design, such as highly confined plasmons and fast electrical tuning by carrier injection. Here, we predict strong magnetic dipole response by graphene split nanorings at THz frequencies allowing to achieve metamaterials with a high degree of field confinement (~ one hundredth of the excitation wavelength) that is not attainable by using thin layers of conventional noble metals