Open AccessGamma radiation effects on absorption and emission properties of erbium-doped silicate glasses
Author(s) -
Yubang Sheng,
Yang Luuml;-Yun,
Huaixun Luan,
Zijun Liu,
Jinyan Li,
Nengli Dai
Publication year - 2012
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.61.116301
Subject(s) - materials science , silicate , photoluminescence , absorption (acoustics) , doping , radioluminescence , radiation , photobleaching , excited state , erbium , analytical chemistry (journal) , radiative transfer , optoelectronics , optics , fluorescence , atomic physics , chemistry , physics , scintillator , composite material , organic chemistry , chromatography , detector
A series of Er-doped silicate glasses is prepared by a conventional melting method under normal processing conditions, and the effects of gamma-ray radiation on absorption and emission properties of all samples are investigated. The radiation-induced darkening causes a strong broad optical absorption band that has a maximum around 400 nm and extends to the near infrared region. The point defects generated in the silicate matrix by irradiation around the Er3+ ion favor the activation of non-radiative relaxation channels thus modifying the photoluminescence quantum efficiency from specific excited levels, such as those emitting at 520 and 650 nm. Photobleaching effects are observed in Er-doped silicate glasses pumped by 980 nm LD at room temperature.