Temporally modulated metamaterial based on a multilayer graphene structure

The recently developed concept of time-varying metamaterials paves the way for advanced methods electromagnetic property modulation, such as magnet-free isolators, frequency converters, and other nonreciprocal photonic components. Here, we analyze metamaterial based on periodically arranged temporally modulated graphene layers via a steplike Fermi level. material properties are described by effective medium theory. wave temporal scattering phenomenon caused rapid level switching is considered. It demonstrated that scattered waves increases grows rapidly vice versa. relation between amplitudes forward- backward-scattered found using Laplace transform technique. proposed allows us to efficiently generate harmonics under instant at few meV. Our investigation provides basement realization multilayer structures functional tunable materials power-efficient converters.