The study of optical properties of graphene intercalated with ferric chloride for application in terahertz photonics

The investigation and development of new functional two-dimensional materials is one of the most important challenges for terahertz (THz) photonics and optoelectronics. These materials allow to dynamically manipulate the properties of the THz radiation. Graphene and graphene-based materials are the promising candidates for this task as they are efficient and fast-acting in the THz frequency range. In this work we have experimentally studied the properties of novel material based on few-layered graphene intercalated with ferric chloride (FeCl₃-FLG) in the THz frequency range. In particular, the influence of infrared optical pumping intensity (using 980 nm continuous-wave (CW) laser) on the spectral properties of FeCl₃-FLG was investigated. The experimental results have shown the efficiency of the suggested method of radiation characteristics control. (paper)