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Structural and optical spectroscopy of LiNbO3:Tm nanocrystals embedded in a SiO2 glass matrix

Identifieur interne : 001344 ( Main/Curation ); précédent : 001343; suivant : 001345

Structural and optical spectroscopy of LiNbO3:Tm nanocrystals embedded in a SiO2 glass matrix

Auteurs : M. P. F. Graca [Portugal] ; M. Peres [Portugal] ; M. A. Valente [Portugal] ; A. J. Neves [Portugal] ; T. Monteiro [Portugal]

Source :

Journal of non-crystalline solids [ 0022-3093 ] ; 2008.

RBID : Pascal:09-0061403

Descripteurs français

Pascal (Inist)
- Dopage, Procédé sol gel, Traitement thermique, Diffraction RX, Spectre Raman, Microscopie électronique balayage, Dimension particule, Photoluminescence, Transfert énergie, Transition niveau énergie, Impureté, Addition thulium, Niobate de lithium, Nanocristal, LiNbO3.
Wicri :
- topic : Dopage.

English descriptors

KwdEn :
- Doping, Energy transfer, Energy-level transitions, Heat treatments, Impurities, Lithium niobates, Nanocrystal, Particle size, Photoluminescence, Raman spectra, Scanning electron microscopy, Sol-gel process, Thulium additions, XRD.

Abstract

Transparent SiO₂:Li₂O:Nb₂O₅ glass doped with Tm³⁺ has been prepared by the sol-gel method, and heat-treated in air (HT) at temperatures between 500 and 800 °C. X-ray diffraction (XRD) patterns and Raman spectroscopy show SiO₂ and LiNbO₃ phases in samples HT above 650 °C, and a NbTmO₄ phase for T > 750 °C. The XRD SEM analysis show increasing particle size and number with the increase of HT temperature. Intra-4f¹² transitions due to Tm³⁺ ion dispersed in the matrix are observed in samples with T>650°C. The luminescence is dominated by the ¹G₄→³F₄ (∼650nm), ¹D₂→³F₃ (∼780nm), ³ H₄ → ³H₆ (∼800 nm), ³H₅ → ³H₆ (∼1200 nm) and ³H₄ → ³F₄ (∼1500 nm) transitions under resonant excitation to the ion levels.

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Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Structural and optical spectroscopy of LiNbO<sub>3</sub>
:Tm nanocrystals embedded in a SiO<sub>2</sub>
 glass matrix</title>
<author><name sortKey="Graca, M P F" sort="Graca, M P F" uniqKey="Graca M" first="M. P. F." last="Graca">M. P. F. Graca</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Physics Department (13N), Aveiro University, Campus Universitário de Santiago</s1>
<s2>3800-193 Aveiro</s2>
<s3>PRT</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
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<country>Portugal</country>
<wicri:noRegion>3800-193 Aveiro</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Peres, M" sort="Peres, M" uniqKey="Peres M" first="M." last="Peres">M. Peres</name>
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<s2>3800-193 Aveiro</s2>
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</author>
<author><name sortKey="Valente, M A" sort="Valente, M A" uniqKey="Valente M" first="M. A." last="Valente">M. A. Valente</name>
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<sZ>2 aut.</sZ>
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</inist:fA14>
<country>Portugal</country>
<wicri:noRegion>3800-193 Aveiro</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Neves, A J" sort="Neves, A J" uniqKey="Neves A" first="A. J." last="Neves">A. J. Neves</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Physics Department (13N), Aveiro University, Campus Universitário de Santiago</s1>
<s2>3800-193 Aveiro</s2>
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<country>Portugal</country>
<wicri:noRegion>3800-193 Aveiro</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Monteiro, T" sort="Monteiro, T" uniqKey="Monteiro T" first="T." last="Monteiro">T. Monteiro</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Physics Department (13N), Aveiro University, Campus Universitário de Santiago</s1>
<s2>3800-193 Aveiro</s2>
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</affiliation>
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<series><title level="j" type="main">Journal of non-crystalline solids</title>
<title level="j" type="abbreviated">J. non-cryst. solids</title>
<idno type="ISSN">0022-3093</idno>
<imprint><date when="2008">2008</date>
</imprint>
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<seriesStmt><title level="j" type="main">Journal of non-crystalline solids</title>
<title level="j" type="abbreviated">J. non-cryst. solids</title>
<idno type="ISSN">0022-3093</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Doping</term>
<term>Energy transfer</term>
<term>Energy-level transitions</term>
<term>Heat treatments</term>
<term>Impurities</term>
<term>Lithium niobates</term>
<term>Nanocrystal</term>
<term>Particle size</term>
<term>Photoluminescence</term>
<term>Raman spectra</term>
<term>Scanning electron microscopy</term>
<term>Sol-gel process</term>
<term>Thulium additions</term>
<term>XRD</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Dopage</term>
<term>Procédé sol gel</term>
<term>Traitement thermique</term>
<term>Diffraction RX</term>
<term>Spectre Raman</term>
<term>Microscopie électronique balayage</term>
<term>Dimension particule</term>
<term>Photoluminescence</term>
<term>Transfert énergie</term>
<term>Transition niveau énergie</term>
<term>Impureté</term>
<term>Addition thulium</term>
<term>Niobate de lithium</term>
<term>Nanocristal</term>
<term>LiNbO3</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Dopage</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Transparent SiO<sub>2</sub>
:Li<sub>2</sub>
O:Nb<sub>2</sub>
O<sub>5</sub>
 glass doped with Tm<sup>3+</sup>
 has been prepared by the sol-gel method, and heat-treated in air (HT) at temperatures between 500 and 800 °C. X-ray diffraction (XRD) patterns and Raman spectroscopy show SiO<sub>2</sub>
 and LiNbO<sub>3</sub>
 phases in samples HT above 650 °C, and a NbTmO<sub>4</sub>
 phase for T > 750 °C. The XRD SEM analysis show increasing particle size and number with the increase of HT temperature. Intra-4f<sup>12</sup>
 transitions due to Tm<sup>3+</sup>
 ion dispersed in the matrix are observed in samples with T>650°C. The luminescence is dominated by the <sup>1</sup>
G<sub>4</sub>
→<sup>3</sup>
F<sub>4</sub>
 (∼650nm), <sup>1</sup>
D<sub>2</sub>
→<sup>3</sup>
F<sub>3</sub>
 (∼780nm), <sup>3</sup>
 H<sub>4</sub>
 → <sup>3</sup>
H<sub>6</sub>
 (∼800 nm), <sup>3</sup>
H<sub>5</sub>
 → <sup>3</sup>
H<sub>6</sub>
 (∼1200 nm) and <sup>3</sup>
H<sub>4</sub>
 → <sup>3</sup>
F<sub>4</sub>
 (∼1500 nm) transitions under resonant excitation to the ion levels.</div>
</front>
</TEI>
</record>

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Structural and optical spectroscopy of LiNbO3:Tm nanocrystals embedded in a SiO2 glass matrix

Structural and optical spectroscopy of LiNbO3:Tm nanocrystals embedded in a SiO2 glass matrix

Source :

Descripteurs français

English descriptors

Abstract

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

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri