Dynamics of optically injected currents in carbon nanotubes

Abstract

We consider theoretically the dynamics of electric currents optically injected in carbon nanotubes. Although the plasma oscillations are not seen in these systems, the main effect on the carrier's motion is due to strongly nonuniform space-charge Coulomb forces produced by time-dependent separation of injected electron and hole densities. We calculate evolution of the dipole moment characterizing the time- and coordinate-dependent charge density distributions and analyze different regimes of the dynamics. The developed time-dependent dipole moment leads to a dipole radiation in the THz frequency range for typical parameters of injected currents.

arXiv comment7 pages, 6 figures

References in corpus (4)

• Strength of effective Coulomb interactions in graphene and graphite
• Coupled dynamics of electrons and phonons in metallic nanotubes: current saturation from hot phonons generation
• Exciton diffusion in semiconducting single-wall carbon nanotubes studied by transient absorption microscopy
• Mode coupling and evolution in broken-symmetry plasmas

Cited by in corpus (1)

• Electron-phonon coupling in metallic carbon nanotubes: Dispersionless electron propagation despite dissipation