Far-infrared reflectivity of Cd3-xZnxAs2 monocrystals

Reflectivity spectra of Cd3-xZnxAs2 solid solutions with compositions x=1.2, 1.8, 2.25, and 2.55 were measured at room temperature within the range of 50-700 cm(-1). Analysis based upon Kramers-Kronig relation has helped to calculate the basic optical functions (real and imaginary parts of dielectric constant, reflection, and absorption idecis) in the measured energy range. Dispersion analysis has been applied to find the parameters of phonons within the range of 50-300 cm(-1). As a result a curve has been made to characterize the dependency of the most strong oscillator upon their composition features. (C) 2000 American Institute of Physics. [S0003-6951(00)01840-4].