Abstract
A three-dimensional plasmonic open waveguide ring resonator (WRR) based on graphene nanoribbons, which has high confinement and multiple tunability, is proposed and numerically investigated. The intensity of edge graphene plasmons modes (EGSPs) in a nanoring resonator reaches the maximum at resonant frequencies, which indicates that EGSPs can efficiently propagate along the open graphene nanoring resonator even though in nanoscale. Furthermore, the resonant frequencies can be easily manipulated not only by adjusting the geometric parameters but also by changing the doping level of graphene via chemical doping or electrostatic gating without changing the physical size of the geometric structure. The proposed plasmonic WRR can find important potential applications in optoelectronic integrated circuits.
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