Parametric instability of plasma waves in graphene excited by a high-frequency electric field
Phys. Rev. B 113, 085402 – Published 2 February, 2026
DOI: https://doi.org/10.1103/df59-28hz
Abstract
The system of Vlasov equations for electrons with a linear Dirac spectrum is solved, and a dispersion equation is derived that describes the influence of a uniform high-frequency electric field on the spectrum and damping rate of two-dimensional terahertz (THz) plasmons in single-layer doped graphene. Our analysis demonstrates that a THz electric field of several tens of kV/cm, applied parallel to the graphene plane, can induce parametric instability of the long-wavelength two-dimensional plasmons. This parametric instability arises from the resonant coupling of plasmon modes, which occurs in a high-frequency electric field due to third-order electrodynamic nonlinearity.
