title: Enhanced broadband near-infrared luminescence of Bi-doped oxyfluoride glasses.
abstract: Broadband near-infrared luminescence covering 900 to 1600 nm has been observed in Bi-doped oxyfluoride silicate glasses. The partial substitution of fluoride for oxide in Bi-doped silicate glasses leads to an increase of the intensity and lifetime of the near-infrared luminescence and blue-shift of the near-infrared emission peaks. Both Bi-doped silicate and oxyfluoride silicate glasses show visible luminescence with blue, green, orange and red emission bands when excited by ultra-violet light. Careful investigation on the luminescence properties indicates that the change of near-infrared luminescence is related to optical basicity, phonon energy of the glass matrix and crystal field around Bi active centers. These results offer a valuable way to control the luminescence properties of Bi-doped materials and may find some applications in fiber amplifier and fiber laser.
authors.affiliation: State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China.
authors.forename: Beibei
authors.initials: B
authors.lastname: Xu
authors.forename: Dezhi
authors.initials: D
authors.lastname: Tan
authors.forename: Shifeng
authors.initials: S
authors.lastname: Zhou
authors.forename: Zhanglian
authors.initials: Z
authors.lastname: Hong
authors.forename: Kaniyarakkal N
authors.initials: KN
authors.lastname: Sharafudeen
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D007259:Infrared Rays; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D010100:Oxygen / Q000737:chemistry
chemical_list: D005459:Fluorides; D010100:Oxygen; D001729:Bismuth