title: Unusual luminescence quenching and reviving behavior of Bi-doped germanate glasses.
abstract: Here for the first time, we report an unusual annealing temperature dependent near-infrared (NIR) luminescence quenching and reviving behavior in Bi-doped MgO-Al₂O₃-GeO₂ glasses. Systematic characterizations of the samples by using differential thermal analysis (DTA), photoluminescence and absorption spectra, X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicate that this phenomenon is associated with the reversible reaction of Bi⁺ and Bi⁰ initiated by the change of local glass structure. Excitingly, wavelength tunable luminescence is also observed and it can be ascribed to selective excitation of active Bi⁺ center in different sites. These results not only open a new way for controlling luminescence properties of main group elements in glass but also provide great value for improving practical active-fiber drawing process.
authors: State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China.
authors: Beibei
authors: B
authors: Xu
authors: Shifeng
authors: S
authors: Zhou
authors: Miaojia
authors: M
authors: Guan
authors: Dezhi
authors: D
authors: Tan
authors: Yu
authors: Y
authors: Teng
authors: Jiajia
authors: J
authors: Zhou
authors: Zhijun
authors: Z
authors: Ma
authors: Zhanglian
authors: Z
authors: Hong
authors: Jianrong
authors: J
authors: Qiu