Graphene-Based Plasmonic Platform for Reconfigurable Terahertz Nanodevices

We propose here a new platform to realize a plethora of graphene-based plasmonic nanodevices for frequency-agile terahertz (THz) frontend circuits. We demonstrate that a class of hybrid electronic-plasmonic nanodevices combining active graphene field-effect transistors (GFET) and graphene plasmonic waveguides (GPWG) supporting tightly confined propagation of THz signals, with tailored phase velocity and characteristic impedance controlled by the gate and drain voltages of GFET. We propose a variety of reconfigurable graphene-based nanodevices based on this general architecture, including reconfigurable and electronically programmable phase-shifters, filters, transformers, modulators, and terminators. We envision the integration of these THz circuit elements into a fully reconfigurable THz system as a fundamental step toward new design architectures and protocols for THz communication, sensing, actuation, and biomedical applications