Emission properties of active oxide materials with periodic structure

Aim of project
The aim of the project is to investigate and analyze spectroscopic properties of optically active micro- and nanomaterials with periodic structure. These types of structures are interesting as host materials, in which active ions may have different properties compared to those they have in bulk crystals. In particular, the influence of eutectic structure properties on the rare-earth ions behavior will be investigated. Emission properties of the spectrally selected groups of active ions in Tb3 Sc2Al3O12/ TbScO3, Tb3Sc2Al3O12/air, air/TbScO3, (Yb3Al5 O12/Yb4Al2O9): (1,5%)Er and (Yb2O3/Yb4Al2O9): (1,5%)Er oxide-oxide eutectic will be examined with the help of high-resolution laser spectroscopy. Additionally, spectroscopic analysis will be performed on bulk crystals with the same structures as constituents of eutectic. This analysis will enable determination of the influence of eutectic structure on electron relaxation processes in excited active ions.

Expected results
The influence of eutectic structure on the active ions behavior, especially on lifetimes of excited levels and on the probabilities of radiation transitions, will lead to original properties of such media. These properties will be observed and described. Results of the project will widen knowledge about processes occurring in solid-state active media which have never been investigated in this manner.