Strong Tb3+ emission of TbAlO3 at room temperature

Publisher Website
Google Scholar
Abstract
Optical spectra are measured for transparent and colorless TbAlO3single crystalsgrown by the Czochralski method in a reducing atmosphere, although those grown in an inert atmosphere show blackbody color due to broadband absorption of Tb4+ ions. This is a report on strong Tb3+emission spectrum at room temperature of aluminates and relevant crystals which contain the Tb ion as a stoichiometric agent. All fine structures in absorption and emission spectra can be assigned to the intra‐4f transitions of Tb3+ ions. Similar concentration quenching is observed in Tb x Gd1−x AlO3 system to that in the Nd:YAG crystals; however, the quenching is found to be very small compared with that of the Nd:YAG. An order estimate of the induced emission cross section for the strongest emission line is calculated to be about 6×10−21 cm2.