First-principle study of the near-IR luminescence centers in Bi2O3-GeO2 andBi2O3-SiO2 glasses

V. O. Sokolov; V. G. Plotnichenko; E. M. Dianov

doi:10.1364/OME.5.000163

paper

First-principle study of the near-IR luminescence centers in Bi2O3-GeO2 andBi2O3-SiO2 glasses

arXiv:1412.5832 · doi:10.1364/OME.5.000163

Abstract

First-principle study of bismuth-related oxygen-deficient centers ( $=$ Bi $\dots$ Ge $\equiv$ , $=$ Bi $\dots$ Si $\equiv$ , and $=$ Bi $\dots$ Bi $=$ oxygen vacancies) in Bi $_{2}$ O $_{3}$ -GeO $_{2}$ , Bi $_{2}$ O $_{3}$ -SiO $_{2}$ , Bi $_{2}$ O $_{3}$ -Al $_{2}$ O $_{3}$ -GeO $_{2}$ , and Bi $_{2}$ O $_{3}$ -Al $_{2}$ O $_{3}$ -SiO $_{2}$ hosts is performed. A comparison of calculated spectral properties of the centers with the experimental data on luminescence emission and excitation spectra suggests that luminescence in the 1.2-1.3 $μ$ m and 1.8-3.0 $μ$ m ranges in Bi $_{2}$ O $_{3}$ -GeO $_{2}$ glasses and crystals is likely caused by $=$ Bi $\dots$ Ge $\equiv$ and $=$ Bi $\dots$ Bi $=$ centers, respectively, and the luminescence near 1.1 $μ$ m in Bi $_{2}$ O $_{3}$ -Al $_{2}$ O $_{3}$ -GeO $_{2}$ glasses and crystals may be caused by $=$ Bi $\dots$ Ge $\equiv$ center with (AlO $_{4}$ ) $^{-}$ center in the second coordination shell of Ge atom.

5 pages, 3 figures, 25 references

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