Abstract-Optical constants of CuO and ZnO particles in the terahertz frequency range

Author links open overlay panelJaume Alexandre Locquet, Denis Bouscaud, Sophie Berveiller, D.S.Citrin, 




https://www.sciencedirect.com/science/article/pii/S0272884220318502

The optical constants (complex dielectric function) of CuO and ZnO particles in polyethylene pellets are measured by terahertz time-domain spectroscopy. The determination of the dielectric properties of these materials is of interest for energy-storage applications, for instance. Maxwell-Garnett theory is used to extract the contribution to the frequency-dependent optical constants of the oxide powders. The validity of the assumptions of Maxwell-Garnett theory are experimentally verified and self-consistency of the results of the model confirmed. On this basis, experimental complex permittivity values for isotropic CuO and ZnO oxide powders are reported in the 100 GHz-3 THz range.