The development of new solid state laser hosts for high optical quality rare-earth ion doped crystals, glasses, and ceramics is an active area of current materials research. To facilitate the design of materials with optimized emission properties, detailed structural information at the atomic level is essential, regarding the local bonding environment (siting) of the rare earth ions, their second-nearest coordination sphere, and their extent of local clustering, as well as the distribution over separate micro- or nanophases in composite materials. In this project, solid state NMR and EPR will be used to seek a fundamental understanding of the spectroscopic and photophysical properties of such material systems on a structural basis. The systems to be studied are oxyfluoride glasses and ceramics based on calcium and lead fluorophosphate compositions. In connection with this project a comprehensive solid state NMR and EPR strategy will be developed for the structural characterization of rare-earth doped glasses and ceramics. The structural information obtained by these approaches and its correlation with the optical materials properties will be important for developing new design strategies for high power laser materials.
News published in Agência FAPESP Newsletter about the scholarship: