Open AccessAg nanoparticles enhanced 2 um luminescences of Ho3+/Tm3+ codoped bismuth germanate glasses
Author(s) -
薛冰,
许银生,
李烟塬,
戚嘉妮,
鲁珊珊,
鲁克伦,
陈丽艳,
张绍骞,
戴世勋
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.107802
Subject(s) - materials science , luminescence , bismuth germanate , germanate , analytical chemistry (journal) , nanoparticle , surface plasmon resonance , bismuth , quenching (fluorescence) , ion , absorption (acoustics) , fluorescence , doping , optics , nanotechnology , optoelectronics , chemistry , scintillator , physics , detector , metallurgy , organic chemistry , chromatography , composite material
The Ho3+/Tm3+ codoped bismuth germanate glasses containing Ag nanoparticles (NPs) are synthesized by a chemical reduction method based on the conventional melting-quenching technique. The effect of concentration of Ag NPs on the 2 um emission is studied. The absorption band related to the surface plasmon resonance (SPR) of the Ag NPs is located in a range from 500 to 900 nm. Transmission electron microscopic image clearly reveals homogeneously dispersed Ag NPs with the sizes ranging from 5 to 10 nm. The luminescence spectra in a range of 1.7-2.3 um are collected. With the addition mass fraction of the AgCl up to 0.3%, the intensity of emission band of Ho3+ ions, centered at 2.03 um, is increased by 10 folds. The enhancement of 2 um luminescence is attributed to the enhanced local field induced by SPR of Ag NPs. The calculated absorption cross section and emission cross section are 0.491 10-20 cm-2 and 1.0310-20 cm-2, respectively. When the gain coefficient p=0.2, the positive gain would be realised.