Abstract
The emission of Cd 1− x Mn x S is investigated at low concentrations ( x < 0.01) and at high concentrations ( x > 0.01) of Mn by time resolved spectroscopy. At low concentration x the zero phonon lines due to the 3d transition 4T 1 → 6A 1 of Mn 2+ are analysed. The emission has an exponential decay with τ = 0.65 ms. The results of Zeeman measurements, which are to be compared to the values obtained with Mn in ZnS, ZnSe, and GaP, confirm the assignments of the zero phonon lines. At high values of x, the decay of emission due to the internal transition of Mn follows a square root law known from percolation theory. In addition, two more emission bands peaking at 11100 cm -1 and 13300 cm -1 are observed. In the 11100 cm -1 band a temperature dependent build-up phenomenon was registered, when Mn 2+ was excited by internal transitions within the 3d shell.
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