A. A. Veber, A. N. Romanov, O. V. Usovich, Z. T. Fattakhova, E. V. Haula, V. N. Korchak, L. A. Trusov, P. E. Kazin, V. B. Sulimov, V. B. Tsvetkov
We observed an intensive near-infrared luminescence in Bi-doped KAlCl4 polycrystalline material. Luminescence dependence on the excitation wavelength and temperature of the sample was studied. Our experimental results allow asserting that the luminescence peaked near 1 um belongs solely to Bi+ ion which isomorphically substitutes potassium in the crystal. It was also demonstrated that Bi+ luminescence features strongly depend on the local ion surroundings.
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http://arxiv.org/abs/1204.5073
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