Asymmetric graphene metamaterial for narrowband terahertz modulation

The properties of planar three-layer asymmetric split-ring metamaterial are studied analytically by a coupled oscillator model and equivalent circuit model. These results are verified using full-wave numerical simulations. The influence of geometrical parameters of the proposed metamaterial structure, as well as graphene properties on the device terahertz spectral characteristics, are investigated in details. Such a comprehensive approach in graphene metamaterial description allows to design efficient narrowband modulator for a wide range of specific tasks including applications in terahertz sensing and switching.