Open AccessDIRECT UPCONVERSION SENSITIZATION LUMINESCENCE OF Er:OXYFLUORIDE GLASSCERAMICS
Author(s) -
Xiaobo Chen,
Meixian Li,
N.Sawanobori,
Zhe Zeng,
Yuxin Nie
Publication year - 2000
Publication title -
acta physica sinica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.49.2482
Subject(s) - photon upconversion , luminescence , materials science , ion , excited state , laser , fluorescence , excitation , optoelectronics , optics , absorption (acoustics) , atomic physics , physics , quantum mechanics , composite material
This paper researches the direct up-conversion sensitization luminescence of ErY b codoped oxyfluoride glassceramics(ErYb:FOV) excited by CW 966nm-diode laser.It is found that the upconversion mechanism of direct upconversion sensitization l uminescence of YbEr:FOV sample is mainly the energy transfer between Er3+ and Yb3+ ion but not the step-by-step absorption of single Er3+ion.This oxyfluoride vitroceramics is forming PbxCd1-x F2 fluoride micro-crystallines.And the rare earth ions tend to concentrate in the micro-crystalline,in which there is an intense cluster effect .So upconversion luminescence is very strong. On the other hand,the log-log vari ation of up-conversion luminescence intensity with laser power emerges a kind of “typical saturation phenomenon”,in which F-P curve is bended gradually result ing from population exhausting in ground state.We also find a new kind of up-con version cooperative radiation fluorescence originating from a kind of Couple Sta te of cluster consisting of two Yb3+ions in this ErYb:FOV.
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