A terahertz photomixer based on plasmonic nanoantennas coupled to a graphene emitter.

We propose the concept of a graphene-based nanoantenna-enhanced photomixer to realize wideband-tunable terahertz (THz) frequency generation. When two laser beams are focused on the graphene nanoemitter of a planar field-emission diode, THz current oscillations can be created at the emitter tip through the optical heterodyne. Graphene's optical transparency… CONTINUE READING