Spectral-luminescent properties of orthorhombic and monoclinic tungstate and molybdate crystals doped with europium, terbium, thulium, and ytterbium ions

Identificador:  TDX:4036

Handle: https://hdl.handle.net/20.500.11797/TDX4036

Autores:  Volokitina, Anna

Resumen:
This work deals with an exhaustive study of the spectral luminescent properties of the new crystals of low symmetry monoclinic orthorhombic molybdate and tungstate doped with ions of europium, terbium, thulium and ytterbium, including both the study of the anisotropy of the spectral luminescent properties, the determination of the main spectroscopic characteristics, as well as determine the possibility of using such crystals as active laser medium for the visible and near-infrared spectral regions and obtain lasers in these materials, even in the microchip-laser configuration. The main results of the study:1. The main spectral luminescence characteristics of europium ions, terbium, thulium and ytterbium in double tungstate crystals KY(WO4)2, KLu(WO4)2, double molybdate crystals KY(MoO4)2, CsGd(MoO4)2 and ZnWO4 zinc tungstate crystals. 2. The Stark division of multiplets and the width of the zero phonon line of Yb3+ ions in ZnWO4 crystals and KY(MoO4)2 have been determined for the first time. It was found that the heterovalent mechanism of substitution in the ZnWO4 crystals leads to a remarkable broadening of the zero-phonon line and a high value of the division of Stark of the Yb3+ multiplets.