Resonant Generation of Higher Harmonics of Terahertz Pulses in the Layered Structures Dielectric - Graphene

Nonlinear propagation of short terahertz pulses in the layered structures dielectric -graphene -dielectric … is investigated theoretically on the base of direct simulations of the Maxwell equations and the hydrodynamic equations for electrons in graphene layers. The using of the nonlinear hydrodynamics is justified from a comparison of quasi -classical kinetics, quantum kinetics, and the hydrodynamics. The effective electron mass has been determined for the hydrodynamics. The numerical FDTD scheme is proposed to consider the boundary conditions at graphene sheets. The resonant generation of odd harmonics of THz radiation has been investigated.