title: The near-infrared broadband emission from bismuth-doped GeO2-WO3 and GeO2-BaO glasses.
abstract: Glasses with the composition of (99.5-chi)GeO2-chiWO(3)-0.5Bi2O3 (chi=3, 6, 9 mol%) and (99.5-psi)GeO2-psiBaO-0.5Bi2O3 (psi=3, 6, 9 mol%) were prepared. Their thermal, emission and absorption measurements were carried out. The near-infrared super broadband emission of the prepared samples peak around 1.3 microm was discovered. The results indicated, in GeO2-WO3-Bi2O3 glasses, increasing amount of WO3 brought about the broadening of FWHM, prolonging of lifetime and enhancing of thermal stabilities. While in GeO2-BaO-Bi2O3 glasses, concomitant with the increasing amount of BaO were the broadened FWHM as well as the prolonged lifetime. Red-shift tendency of absorption edges was discovered in both two groups of glasses indicating the Bi5+ ions might take responsibility for the broadband emission.
authors: Laboratory of Photo-Electronic Materials, Ningbo University, Ningbo, Zhejiang Province 315211, China. hpxcm@nbu.edu.cn
authors: Haiping
authors: H
authors: Xia
authors: Xuejun
authors: X
authors: Wang
mesh_terms: D017609:Barium Compounds / Q000737:chemistry*; D001729:Bismuth / Q000737:chemistry*; D005857:Germanium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D006358:Hot Temperature; D010087:Oxides / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods; D013997:Time Factors; D014414:Tungsten / Q000737:chemistry*
chemical_list: D017609:Barium Compounds; D010087:Oxides; D005857:Germanium; C040516:germanium oxide; C077606:barium oxide; C511604:tungsten oxide; D001729:Bismuth; D014414:Tungsten