Plasmon Resonances in the Quantum Strong Field Limit

Abstract

The plasmon spectrum is investigated in the quantum strong field limit, (ℏω_c > ζ ∼ E_F). We find another set of plasmon resonances in addition to those already discussed in the literature. This new set of resonances is only very mildly damped under appropriate conditions of low wavenumber. Under such low wavenumber conditions, the new resonances are of comparable importance (in terms of excitation amplitude) with other resonances previously reported. The result is that there are two plasmon resonances which lie near each multiple of the cyclotron frequency, except for propagation nearly perpendicular to the magnetic field.