High efficiency and low threshold upconversion from IR to red for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic

	High efficiency and low threshold upconversion from IR to red for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic
其他题名	论文其他题名
	Qin G. S.; Qin W. P.; Chen B. J.; E S. L.; Ge Z. J.; Ren X. G.; Huang S. H.
	2002
发表期刊	Spectroscopy and Spectral Analysis
ISSN	1000-0593
卷号	22 期号:5 页码:705-708
摘要	In this paper, high efficiency and low threshold upconversion from IR to red is reported, for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic under 978 nm LD excitation. The component of sample in experiment is 65GeO(2)-25NaF-8.5BaF(2)-1Er(2)O(3)-0.5 Tm2O3, and the prepared method is obtained. The upconversion emission spectra under 978 nm LD excitation is measured at room temperature. Analyzing it, we find that introduction of Tm3+ into Er3+ doped system p referentially quenches the green upconversion fluorescence from S-4(3/2) level of Er3+ duo to the efficient cross-relaxation I-4(13/2) --> I-4(15/2) (Er): H-3(6) --> H-3(4) (Tm) which can significantly reduce the upconversion efficiency from I-4(13/2) level to the emitting S-4(3/2) level, and the Tm3+ behaves as a good sensitizer of the red upconversion from the F-4(9/2) level of Er3+ which is mainly populated by the cross-relaxation of H-3(4) --> H-3(6) (Tm): I-4(11/2) --> F-4(9/2) (Er). However, at low E3+ concentration (2 mol %), it is impossible for strong red upconversion. X-ray analysis is done, there are lots of nanocrystallites in MFG glass-ceramic. So we think, this red upconversion is attributed to Er3+ enriched fluoride microcrystallites, which makes the cross-relaxation of H-3(4) --> H-3(6) (Tm): I-4(11/2) --> F-4(9/2) (Er) more effective, therefore their active optical properties may be optimised. In the end, the relationship between LD working current and intensity of upconversion luminescence is discussed, the results confirm that both red and green upconversion processes are consisted by two photons.
收录类别	SCI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/25857
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Qin G. S.,Qin W. P.,Chen B. J.,et al. High efficiency and low threshold upconversion from IR to red for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic[J]. Spectroscopy and Spectral Analysis,2002,22(5):705-708.
APA	Qin G. S..,Qin W. P..,Chen B. J..,E S. L..,Ge Z. J..,...&Huang S. H..(2002).High efficiency and low threshold upconversion from IR to red for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic.Spectroscopy and Spectral Analysis,22(5),705-708.
MLA	Qin G. S.,et al."High efficiency and low threshold upconversion from IR to red for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic".Spectroscopy and Spectral Analysis 22.5(2002):705-708.

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