Study of Optical and Transport Properties of Cd1-xZnxTe and CdSexTe1-x by Far-IR Reflectance Spectra

Far-infrared (FIR) reflectance spectroscopy was employed to study a series of bulk Cd1-xZnxTe with varying Zn content (0-100%) and bulk CdSexTe1-x with varying Se content (5-35%). The dielectric response function model and least-square fit were used to find the optical and transport parameters. With an increase in the Zn content; the effective mass of Cd1-xZnxTe increases slightly, while the carrier concentration increases significantly; however, the mobility and conductivity decrease. With an increase in the Se content, the effective mass of CdSexTe1-x decreases slightly, while the mobility, carrier concentration, and conductivity increase significantly.