Temperature Dependent Optical Properties in a Strained Diluted Magnetic Quantum Well

Abstract

Temperature dependence of the exciton in a Cd1−x out Mnx out Te/Cd1−x in Mnx in Te/Cd1−x out Mnx out Te strained quantum well is investigated for various Mn content. Spin polaronic shifts are estimated using mean field theory for different Mn concentration and the well sizes. Calculations are performed for various Mn ion content in a Cd1−xMnxTe material in which the strong built-in electric field due to piezoelectric polarizations are included. A theoretical study of diluted magnetic semiconductors treating local sp-d exchange interaction J between the itinerant carriers and the Mn electrons are treated within a realistic band structure. The temperature dependent optical absorption and the refractive index changes as a function of normalized photon energy with various Mn ion content are analyzed. Our results show that the occurred red shifts of the absorption resonant peak due to the effect of temperature give the information about the variation of two energy levels in the quantum well. The optical absorption coefficients and the refractive index changes strongly depend on the incident optical intensity, the temperature effect and the Mn content.