On graphene-based THz plasmonic nano-antennas

Graphene-enabled wireless communications create an innovative archetype proposed to implement wireless communications at the nanoscale. Indeed, graphene-based nano-antennas, or graphennas, are few micrometers in size. Such antennas have been predicted to radiate electromagnetic waves at the Terahertz band. Hence, they do not only provide better integrability for future miniaturized wireless systems but also represent an enabling technology for applications such as wireless nano-sensor networks and Internet-of-Things (IoT). This paper surveys the existing research which investigates the state-of-art of graphene-based plasmonic nano-antennas. The paper focuses on the propagation of Surface Plasmon Polariton (SPP) waves since they set up the main characteristics of these antennas. Various fundamental properties of plasmonic antennas are also discussed providing useful guidelines for future designers of these antennas. The paper also addresses the future research areas of graphene-based Terahertz nano-antennas.