Emission properties of eutectic with self-organized rodlike microstructure

An investigation of spectroscopic properties of Tb3+ ions in terbium-scandium-aluminum garnet - terbium-scandium perovskite Tb3Sc2Al3O12–TbScO3 (TSAG-TSP) eutectic and, for comparison, in bulk Tb3Sc2Al3O12 (TSAG) and TbScO3 (TSP) crystals is presented. The emission and fluorescence decays from the 5D4 level of Tb3+ ion after pulsed, one-photon excitation are characterized as a temperature function from 10 to 300 K. Spectrally selected groups of Tb3+ ions located in particular phases of eutectic were characterized using a time–resolved spectroscopy. The cross-relaxation process leading to the quenching of luminescence from the 5D4 excited state of Tb3+ ions in all investigated materials was observed and analyzed. The presented eutectic materials have a high potential for photonic applications.