Terahertz Conductivity of Iron Oxide-Graphene Oxide Composite Pellet

Electrical and optical characteristics of materials are the most used physical properties that serve as tools to identify and analyze certain dynamics of matter being studied. In this paper, the optical parameters of iron oxide-graphene oxide composite mixed with polyethylene were characterized using terahertz time domain spectroscopy (THz-TDS) and impedance spectroscopy. The real and imaginary conductivities were obtained from impedance measurements in the low frequency range. The complex refractive index and absorption coefficient were also determined using THz-TDS. From these quantities, the complex conductivity of the sample was determined and was fitted using the combined Drude-Smith Lorentz model.