Abstract
High resolution reflectance spectroscopy experiments were performed to study the Zn 3d states of Zn 1- x Mn x S over the whole concentration range (0≤ x≤0.56). For zincblende-type samples ( x<0.05), we observe the excitation of three core level excitons reflecting the threefold split Zn 3d states at the Γ-point. The splitting of the Γ 5 state due to spin-orbit interaction is Δ so=251 meV. For the core exciton binding energy, a value of 517 meV is determined. For wurtzite-type samples ( x>0.05), the core exciton derived structures are broadened, reflecting the tenfold splitting of the 3d states under C 6v symmetry.
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