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Spectroscopic investigations of OH-influence on near-infrared fluorescence quenching of Yb3+/Tm3+ co-doped sodium-metaphosphate glasses

Identifieur interne : 001347 ( Main/Exploration ); précédent : 001346; suivant : 001348

Spectroscopic 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.

RBID : Pascal:08-0285205

Descripteurs français

Pascal (Inist)
- Rayonnement IR proche, Extinction luminescence, Codopage, Transfert énergie, Addition ytterbium, Relaxation croisée, Addition thulium, Fluorescence, Rendement quantique, Verre phosphate.

English descriptors

KwdEn :
- Codoping, Cross relaxation, Energy transfer, Fluorescence, Luminescence quenching, Near infrared radiation, Phosphate glass, Quantum yield, Thulium additions, Ytterbium additions.

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.

Affiliations:

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Le document en format XML

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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>
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<tree><country name="Brésil"><region name="État de São Paulo"><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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<name sortKey="De Camargo, A S S" sort="De Camargo, A S S" uniqKey="De Camargo A" first="A. S. S." last="De Camargo">A. S. S. De Camargo</name>
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<name sortKey="Terrile, M C" sort="Terrile, M C" uniqKey="Terrile M" first="M. C." last="Terrile">M. C. Terrile</name>
</country>
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</record>

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Spectroscopic investigations of OH-influence on near-infrared fluorescence quenching of Yb3+/Tm3+ co-doped sodium-metaphosphate glasses

Spectroscopic investigations of OH-influence on near-infrared fluorescence quenching of Yb3+/Tm3+ co-doped sodium-metaphosphate glasses

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri