Abstract
In current years, researchers consecrated much regard to nonlinear photonic crystals as their employment in photonic bandgap compounds for testing and moving light. The growth of study in nonlinear optics is intimately connected to the fast technological advancements that have happened in associated fields such as optical communication and optical storage devices. In this framework, we investigate the optical properties such as absorption, conductivity, refractive index, and dielectric function of HfTeSe4, HfTe4Ge, GeTe, GaTe, and HfTe5 monolayers, using density functional theory. We found that the imaginary part ɛ2(ω) of the dielectric function leaves at neighboring 20.00 eV, which corresponds to the energy loss function. In this framework, we have obtained these compounds become transparent when the frequency of the incident light is higher than the plasma frequency (20.00 eV). Further, we reach the highest reflectivity for the HfTe5 sheet, which has a value of around 0.5% at the energy of 2.00 eV.
•We study the optical properties of HfTeSe4, HfTe4Ge, GeTe, GaTe, and HfTe5.•We reach the highest reflectivity for the 2D HfTe5 sheet.•Our 2D layers become transparent when the frequency is higher than 20.00 eV.•These sheets a promising nanostructure for a variety of applications in spintronics.