Spectroscopic investigations of OH-influence on near-infrared fluorescence quenching of Yb3+/Tm3+ co-doped sodium-metaphosphate glasses
Identifieur interne : 001347 ( Main/Curation ); précédent : 001346; suivant : 001348Spectroscopic investigations of OH-influence on near-infrared fluorescence quenching of Yb3+/Tm3+ co-doped sodium-metaphosphate glasses
Auteurs : I. A. A. Terra [Brésil] ; A. S. S. De Camargo [Brésil] ; M. C. Terrile [Brésil] ; L. A. O. Nunes [Brésil]Source :
- Journal of luminescence [ 0022-2313 ] ; 2008.
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Abstract
Energy transfer processes were studied in two sets of Yb3+ and Tm3+ co-doped sodium-metaphosphate glasses, prepared in air and nitrogen atmospheres. Using Förster, Dexter, and Miyakawa theoretical models, the energy transfer parameters were calculated. The main ion-ion energy transfer processes analyzed were energy migration among Yb3+ ions, cross-relaxations between Yb3+ and Tm3+ ions, and interactions with OH- radicals. The results indicated that Yb→Tm energy transfer favors 1.8 μm emissions, and there is no evidence of concentration quenching up to 2% Tm2O3 doping. As expected, samples prepared in nitrogen atmosphere present higher fluorescence quantum efficiency than those prepared in air, and this feature is specially noted in the near-infrared region, where the interaction with the OH- radicals is more pronounced.
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co-doped sodium-metaphosphate glasses</title>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Spectroscopic investigations of OH<sup>-</sup>
influence on near-infrared fluorescence quenching of Yb<sup>3+</sup>
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co-doped sodium-metaphosphate glasses</title>
<author><name sortKey="Terra, I A A" sort="Terra, I A A" uniqKey="Terra I" first="I. A. A." last="Terra">I. A. A. Terra</name>
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<series><title level="j" type="main">Journal of luminescence</title>
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<seriesStmt><title level="j" type="main">Journal of luminescence</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Codoping</term>
<term>Cross relaxation</term>
<term>Energy transfer</term>
<term>Fluorescence</term>
<term>Luminescence quenching</term>
<term>Near infrared radiation</term>
<term>Phosphate glass</term>
<term>Quantum yield</term>
<term>Thulium additions</term>
<term>Ytterbium additions</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Rayonnement IR proche</term>
<term>Extinction luminescence</term>
<term>Codopage</term>
<term>Transfert énergie</term>
<term>Addition ytterbium</term>
<term>Relaxation croisée</term>
<term>Addition thulium</term>
<term>Fluorescence</term>
<term>Rendement quantique</term>
<term>Verre phosphate</term>
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<front><div type="abstract" xml:lang="en">Energy transfer processes were studied in two sets of Yb<sup>3+</sup>
and Tm<sup>3+</sup>
co-doped sodium-metaphosphate glasses, prepared in air and nitrogen atmospheres. Using Förster, Dexter, and Miyakawa theoretical models, the energy transfer parameters were calculated. The main ion-ion energy transfer processes analyzed were energy migration among Yb<sup>3+</sup>
ions, cross-relaxations between Yb<sup>3+</sup>
and Tm<sup>3+</sup>
ions, and interactions with OH<sup>-</sup>
radicals. The results indicated that Yb→Tm energy transfer favors 1.8 μm emissions, and there is no evidence of concentration quenching up to 2% Tm<sub>2</sub>
O<sub>3</sub>
doping. As expected, samples prepared in nitrogen atmosphere present higher fluorescence quantum efficiency than those prepared in air, and this feature is specially noted in the near-infrared region, where the interaction with the OH<sup>-</sup>
radicals is more pronounced.</div>
</front>
</TEI>
</record>
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