From the infrared to the visible range: Spectroscopic studies of ytterbium doped oxyborates

OPTICS COMMUNICATIONS

卷:282

Article

Jubera, V.¹  Sablayrolles, J.¹  Guillen, F.¹  Decourt, R.¹  Garcia, A.^1,2 

[1] Univ Bordeaux 1, ICMCB CNRS, F-33608 Pessac, France

[2] Univ Bordeaux 1, UMR CNRS 5255, Inst Mol Sci, GSM, F-33405 Talence, France

关键词: Ytterbium;    Oxyborate;    Luminescence;    Cooperative luminescence;   

DOI  :  10.1016/j.optcom.2008.09.075

来源: Elsevier

【 摘 要 】

The spectroscopic study of yttrium oxyborates doped with trivalent ytterbium is conducted in the UV-Visible and infrared range. The multiplicity of the ytterbium environments in the studied compounds leads to complex emission spectra in the infrared and excitation spectra in the ultraviolet. Different (2)F(5/2) and (2)F(7/2) transitions have been pointed out. The emission extends up to 1090 nm for one compound. A correlation was evidenced between position and cle-excitation mode of a charge transfer band and ytterbium environment for both oxyborates. Decay time dependence as a function of ytterbium concentration is also reported. For the highest concentration, a blue-green luminescence can be observed under strong IR excitation. Its study revealed two possible mechanisms: erbium ion emission at 550 nm after up-conversion and cooperative luminescence of ytterbium ions. (C) 2008 Elsevier B.V. All rights reserved.

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