Spectroscopic investigation and heat generation of Yb3+/Ho3+ codoped aluminosilicate glasses looking for the emission at 2 μm
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
30/05/2014
30/05/2014
01/05/2013
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Resumo |
Energy transfer (ET) and heat generation processes in Yb3+/Ho3+-codoped low-silica calcium aluminosilicate glasses were investigated using thermal lens (TL) and photoluminescence measurements looking for the emission around 2.0 μm. Stepwise ET processes from Yb3+ to Ho3+, upon excitation at 0.976 μm, produced highly efficient emission in the mid-infrared range at around 2.0 μm, with high fluorescence quantum efficiency (η1 ∼ 0.85 and independent of Ho3+ concentration) and relatively very low thermal loading (<0.4) for concentration up to 1.5% of Ho2O3. An equation was deduced for the description of the TL results that provided the absolute value of η1 and the number of emitted photons at 2.0 μm per absorbed pump photon by the Yb3+ ions, the latter reaching 60% for the highest Ho3+ concentration. These results suggest that the studied codoped system would be a promising candidate for the construction of photonic devices, especially for medical applications. PRONEX/FAPEAL (2009-09-006) FINEP CNPq Instituto Nacional de Ciência e Tecnologia de NanoBioEstruturas & Simulação NanoBioMolecular (INCT NANO(BIO)SIMES) CAPES (02727/09-9) Fundação Araucária CAPES / COFECUB |
Identificador |
Journal of the Optical Society of America B, Washington, DC : Optical Society of America - OSA, v. 30, n. 5, p. 1322-1328, May 2013 0740-3224 http://www.producao.usp.br/handle/BDPI/45178 10.1364/JOSAB.30.001322 |
Idioma(s) |
eng |
Publicador |
Optical Society of America - OSA Washington, DC |
Relação |
Journal of the Optical Society of America B |
Direitos |
restrictedAccess Copyright Optical Society of America |
Palavras-Chave | #EMISSÃO DA LUZ #QUÍMICA INORGÂNICA #SILÍCIO |
Tipo |
article original article publishedVersion |