Calculation of the Reflectivity, Modulated Reflectivity, and Band Structure of GaAs, GaP, ZnSe, and ZnS

We have calculated the electronic energy band structure, the imaginary part of the frequency-dependent dielectric function, the reflectivity, and the modulated reflectivity (derivative of the reflectivity) for GaAs, GaP, ZnSe, and ZnS, using the empirical pseudopotential method. A direct comparison of the measured and calculated reflectivities is made. The calculated derivative of the reflectivity spectrum is compared with thermoreflectance data.