Highly efficient upconversion emission and luminescence switching from Yb3+/Tm3+ co-doped water-free low silica calcium aluminosilicate glass
Identifieur interne : 001401 ( Main/Exploration ); précédent : 001400; suivant : 001402Highly efficient upconversion emission and luminescence switching from Yb3+/Tm3+ co-doped water-free low silica calcium aluminosilicate glass
Auteurs : W. F. Silva [Brésil] ; F. G. Rego-Filho [Brésil] ; M. T. De Araujo [Brésil] ; E. A. Gouveia [Brésil] ; M. V. D. Vermelho [Brésil] ; P. T. Udo [Brésil] ; N. G. C. Astrath [Brésil] ; M. L. Baesso [Brésil] ; C. Jacinto [Brésil]Source :
- Journal of luminescence [ 0022-2313 ] ; 2008.
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- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
We present highly efficient 480 and 800 nm upconversion emissions in Tm3+/Yb3+ co-doped water-free low silica calcium aluminosilicate glass under excitation at 976 nm. As a result of this efficient upconversion process, a luminescent switching with the excitation intensity has been observed. The switching is explained and discussed using rate equations analysis and saturation effects. By means of fitting of the experimental data point, it was possible to obtain the value of the energy transfer parameter related to the transition 2F5/2, 3H4→2F7/2, 1G4. The value of this parameter is higher than that of materials like YLF. This switching mechanism could be used in the development of sensors and networks for optical processing and optical communications.
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co-doped water-free low silica calcium aluminosilicate glass</title>
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<series><title level="j" type="main">Journal of luminescence</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminosilicate glass</term>
<term>Codoping</term>
<term>Energy transfer</term>
<term>Energy-level transitions</term>
<term>Excitation intensity</term>
<term>Frequency conversion</term>
<term>Photoluminescence</term>
<term>Rate equation</term>
<term>Thulium additions</term>
<term>Ytterbium additions</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Photoluminescence</term>
<term>Transition niveau énergie</term>
<term>Codopage</term>
<term>Conversion fréquence</term>
<term>Intensité excitation</term>
<term>Equation vitesse</term>
<term>Transfert énergie</term>
<term>Addition ytterbium</term>
<term>Addition thulium</term>
<term>Verre aluminosilicate</term>
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<front><div type="abstract" xml:lang="en">We present highly efficient 480 and 800 nm upconversion emissions in Tm<sup>3+</sup>
/Yb<sup>3+</sup>
co-doped water-free low silica calcium aluminosilicate glass under excitation at 976 nm. As a result of this efficient upconversion process, a luminescent switching with the excitation intensity has been observed. The switching is explained and discussed using rate equations analysis and saturation effects. By means of fitting of the experimental data point, it was possible to obtain the value of the energy transfer parameter related to the transition <sup>2</sup>
F<sub>5/2</sub>
, <sup>3</sup>
H<sub>4</sub>
→<sup>2</sup>
F<sub>7/2</sub>
, <sup>1</sup>
G<sub>4</sub>
. The value of this parameter is higher than that of materials like YLF. This switching mechanism could be used in the development of sensors and networks for optical processing and optical communications.</div>
</front>
</TEI>
<affiliations><list><country><li>Brésil</li>
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<region><li>Alagoas</li>
<li>Paraná (État)</li>
</region>
</list>
<tree><country name="Brésil"><region name="Alagoas"><name sortKey="Silva, W F" sort="Silva, W F" uniqKey="Silva W" first="W. F." last="Silva">W. F. Silva</name>
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<name sortKey="Baesso, M L" sort="Baesso, M L" uniqKey="Baesso M" first="M. L." last="Baesso">M. L. Baesso</name>
<name sortKey="De Araujo, M T" sort="De Araujo, M T" uniqKey="De Araujo M" first="M. T." last="De Araujo">M. T. De Araujo</name>
<name sortKey="Gouveia, E A" sort="Gouveia, E A" uniqKey="Gouveia E" first="E. A." last="Gouveia">E. A. Gouveia</name>
<name sortKey="Jacinto, C" sort="Jacinto, C" uniqKey="Jacinto C" first="C." last="Jacinto">C. Jacinto</name>
<name sortKey="Rego Filho, F G" sort="Rego Filho, F G" uniqKey="Rego Filho F" first="F. G." last="Rego-Filho">F. G. Rego-Filho</name>
<name sortKey="Udo, P T" sort="Udo, P T" uniqKey="Udo P" first="P. T." last="Udo">P. T. Udo</name>
<name sortKey="Vermelho, M V D" sort="Vermelho, M V D" uniqKey="Vermelho M" first="M. V. D." last="Vermelho">M. V. D. Vermelho</name>
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