Photoluminescence of Erimage ions in BiimageTeOimage single crystals

Optical absorption and emission spectra of Erimage ions in BiimageTeOimage single crystals have been studied at room temperature. Besides the image, image, and image, emission, that were typically strong under excitation to higher energy manifolds than the actual emission, the image luminescence was also intense. The visible transitions were assigned, and Judd–Ofelt calculation was performed by fitting the experimental data set. The calculated image Judd–Ofelt intensity parameters (image cmimage; image cmimage; image cmimage) were consistent with the BiimageTeOimage crystal structure and the Erimage substitution for Bi sites. The radiative transition probabilities, the branching ratios and the radiative lifetime of the transitions of Erimage ions in bismuth tellurite were also calculated. The results are analyzed for potential application of BiimageTeOimage:Erimage as a new laser material.