Nanoemitter of giga- and terahertz ranges based on a carbon peapod: Numerical simulation

A mathematical model of a nanoemitter for the giga- and terahertz ranges based on a carbon nanopeapod formed by a (10,10) nanotube with encapsulated C$_{60}$ fullerenes has been proposed. The fundamental possibility of the generation of giga- and terahertz radiation by a charged free fullerene oscillating in the potential well created by the atomic framework of the nanotube and several fullerenes polymerized with its walls and with each other has been proven. The radiation frequency is controlled by means of an external electric field. The dependence of the amplitude and frequency of oscillations on the charge of C$_{60}$ and on the external field strength has been revealed by the molecular dynamics method. If the fullerene has a charge of $+1e$ or $+2e$, it emits electromagnetic waves only in the gigahertz range in strong external fields. At the same time, the physical conditions under which the frequency of radiation can be $0.36$ GHz have been established: the charge of the fullerene must be $+3e$, the tube should be oriented strictly along the external field lines, and the strength should be $0.1$ V/nm.