Excitation Spectra in Cd1-x Mn x Te

Temperature dependence of excitation spectra of photoluminescence (~2.0 eV) related to internal Mn²⁺ transition (MnPL) and infrared (~1.2 eV) one (IRPL) are investigated. The peak of IRPL excitation spectra (IRPLE) in Cd_0.4Mn_0.6Te is at Mn²⁺ d-d internal transition as in the case of MnPL at high temperatures and at low temperatures the peak is at its band gap energy. But in Cd_0.8Mn_0.2Te, the peak of IRPLE is near its band gap energy for all temperatures. We discuss these temperature dependencies and the energy relaxation in the excited states of Cd_1–xMn_xTe.