Cherenkov Terahertz Surface Plasmon Generation Over Graphene Surface by an Electron Beam

AbstractCherenkov terahertz (THz) surface plasmons (SPs) generation by a relativistic electron beam over the graphene surface, deposited on a\(\text {SiO}_2\) substrate, is investigated. The relativistic electron beam tassel produced by SPs produces perturbed linear current density and develops THz SPs via Cherenkov interaction. Electron beam energy from 498.91 to 499.03 KeV is essential for the excitation of THz SPs of 3 to 10 THz. The growth rate of THz SPs depends on the electron beam density and Fermi energy of the graphene surface. The current investigation possesses the potential to be harnessed for the utilization of THz sensors and detectors.
Source: Plasmonics - Category: Biomedical Science Source Type: research