Abstract
Two examples of the visible luminescence of Cu + when embedded in oxides are reported. In Cu +-doped borate glasses, a unique very broad emission band covers the whole visible region. Selective laser spectroscopy shows that copper ions occupy a large variety of sites. The phosphate CuZr 2(PO 4) 3 exhibits two fluorescences occuring in the blue and green regions and assigned to two different centers: the blue, assigned to isolated Cu +, and the green one to Cu + paired ions.
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