Non-reciprocal reflection band in CdMnTe

Non-reciprocal reflection observation at oblique incidence of p-polarized light is reported in CdMnTe crystals with a Mn molar fraction of 20%. at lattice temperature of 2K, in magnetic fields up to 7T in the Voigt configuration. The new feature of reflection is a broad non-reciprocity band between the Zeeman lines related to excitons. Experimental results are compared with a novel modeling approach accounting both for the discrete excitonic levels and valence-to-conduct ion band transitions controlled by the steady magnetic field. The model is found to be in reasonable agreement with experiments. Exciton energies. line widths, band edge broadening and other material parameters are elucidated. (C) 2003 Elsevier B.V. All rights reserved.