Modeling of the Optical Properties of Monolayer WS₂

We report parametric modeling of the optical properties of monolayer WS₂ so its dielectric response can be calculated at temperatures from 41 to 300 K from 1.5 to 6 eV. Parameterization of dielectric function was performed by dielectric-function parametric model, using previously reported dielectric function data which was obtained by spectroscopic ellipsometry. We interpolated the obtained parameters by using cubic polynomials to reconstruct optical properties at arbitrary temperatures. Blue shifts of the bandgap energies and reductions of linewidths of the critical point structures are clearly observed. Given these results, refractive indices and absorption coefficients of the monolayer WS₂ follow also at arbitrary temperatures.