JUBERA, Veronique; SABLAYROLLES, Jean; GUILLEN, François; DECOURT, Rodolphe; COUZI, Michel; GARCIA, Alain

doi:10.1016/j.optcom.2008.09.075

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JUBERA, Veronique
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

SABLAYROLLES, Jean
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

GUILLEN, François
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Optics Communications. 2009, vol. 282, n° 1, p. 53-59

Elsevier

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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 2F5/2 and 2F7/2 transitions have been pointed out. The emission extends up to 1090 nm for one compound. A correlation was evidenced between position and de-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.< Réduire

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

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