Dispersion of volume relativistic magnetoplasma excitation in a gated two-dimensional electron system
P. A. Gusikhin, V. M. Muravev, I. V. Kukushkin
Institute of Solid State Physics RAS, 142432 Chernogolovka, Russia
Abstract
The dispersion of the volume relativistic magnetoplasma mode in a
gated GaAs/AlGaAs quantum well is measured using a coupled resonators
detection technique. The weakly damped relativistic mode exhibits an unusual
zigzag-shaped magnetodispersion dependence dictated by the diagonal component
of the resistivity tensor ρxx. The plasma excitation easily
hybridizes with photon modes due to a large spatial delocalization of its
electromagnetic field. The effects of electron density and structure geometry
on the excitation spectrum have been investigated.