Scanning the Radiation Pattern of Mid-Infrared Graphene Antenna Arrays

The radiation patterns of mid-infrared graphene antenna arrays with N = 256 emitters have been simulated in the CST MWS software package at the resonant frequencies of the surface plasmon polariton fundamental mode in micro- and nanosized rectangular graphene elements for different values of the chemical potential. It has been shown that, with an increase in the chemical potential, the operating frequencies are retuned towards higher mid-IR frequencies, the radiation pattern width at the half-power level decreases, and the direction of the main lobe of the radiation pattern changes; i.e., electronic scanning of the main beam of the radiation pattern occurs.