Efficient UV-visible upconversion luminescence and thermal effects in terbium-ytterbium codoped fluorogermanate vitroceramic

Artur da S. Gouveia-Neto; Luciano A. Bueno; Raphael F. do Nascimento; Elias A. da Silva; Valberes B. do Nascimento; Ernande B. Costa; Sidney J. L. Ribeiro; Younes Messaddeq

doi:10.1117/12.759685

19 February 2008 Efficient UV-visible upconversion luminescence and thermal effects in terbium-ytterbium codoped fluorogermanate vitroceramic

Artur da S. Gouveia-Neto, Luciano A. Bueno, Raphael F. do Nascimento, Elias A. da Silva, Valberes B. do Nascimento, Ernande B. Costa, Sidney J. L. Ribeiro, Younes Messaddeq

Author Affiliations +

Proceedings Volume 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII; 687513 (2008) https://doi.org/10.1117/12.759685
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

Abstract

Cooperative energy-transfer upconversion luminescence in Tb³⁺/Yb³⁺-codoped PbGeO₃PbF₂-CdF₂ vitroceramic and its precursor glass under resonant and off-resonance infrared excitation, is investigated. Bright UV-visible emission signals around 384, 415, 438 nm, and 473-490, 545, 587, and 623 nm, identified as due to the ⁵D₃(⁵G₆) → ⁷F_J(J=6,5,4) and ⁵D₄→⁷F_J(J=6,5,4,3) transitions, respectively, were readily observed. The results indicate that cooperative energy-transfer between ytterbium and terbium ions followed by excited-state absorption are the dominant upconversion excitation mechanisms herein involved. The comparison of the upconversion process in a vitroceramic sample and its glassy precursor revealed that the former present much higher upconversion efficiency. The dependence of the upconversion emission upon pump power, temperature, and doping content is also examined.

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Artur da S. Gouveia-Neto, Luciano A. Bueno, Raphael F. do Nascimento, Elias A. da Silva, Valberes B. do Nascimento, Ernande B. Costa, Sidney J. L. Ribeiro, and Younes Messaddeq "Efficient UV-visible upconversion luminescence and thermal effects in terbium-ytterbium codoped fluorogermanate vitroceramic", Proc. SPIE 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII, 687513 (19 February 2008); https://doi.org/10.1117/12.759685

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