Up-conversion luminescence - A new property in tenebrescent and persistent luminescent hackmanites

The aim of this work was to broaden the optical properties of the synthetic mineral hackmanite by adding ytterbium and erbium dopants inside the hackmanite structure. By this addition we were able to achieve a synthetic hackmanite material capable of showing green and red up-conversion luminescence, blue/white photoluminescence, blue/white persistent luminescence as well as purple tenebrescence in one material. These optical properties can be obtained by exciting with different wavelengths making hackmanite a perfect candidate for optical multiplexing.