Circuit Model For Electrically Controlling the Graphene-Based Meta- Lens

In this research, we propose a circuit model (cm) for a thz meta-lens. the meta-lens is composed of a single graphene layer on a silica substrate and a gold film above the graphene layer. the gold film is etched by an array of cross-shaped apertures (csas) with different size and orientations to control the abrupt electromagnet wave. the focal length of the meta-lens can be electrically controlled by applying a voltage to the graphene sheet. the cm of the meta-lens is initialy introduced without considering the graphene layer. the complete model is then presented, considering the graphene layer, for two different polarizations, te and tm. the model is different for the two polarizations to verify the proposed models, we sum the outputs of the models for the two polarization and compare the result to the output of the fdtd numerical method, where we use a circulary polarized wave as the sum of the te and tm polarizations. the comparision shows a good agreement between the results.

Circuit model for Electrically Controlling the Graphene-based meta- lens

In this research, we propose a circuit model (CM) for a THz meta-lens. The meta-lens is composed of a single graphene layer on a silica substrate and a gold film above the graphene layer. The gold film is etched by an array of cross-shaped apertures (CSAs) with different size and orientations to control the abrupt electromagnet wave. The focal length of the meta-lens can be electrically controlled by applying a voltage to the graphene sheet. The CM of the meta-lens is initialy introduced without considering the graphene layer. The complete model is then presented, considering the graphene layer, for two different polarizations, TE and TM. The model is different for the two polarizations to verify the proposed models, we sum the outputs of the models for the two polarization and compare the result to the output of the FDTD numerical method, where we use a circulary polarized wave as the sum of the TE and TM polarizations. The comparision shows a good agreement between the results.