Share Email Print
cover

Proceedings Paper

Efficient UV-visible upconversion luminescence and thermal effects in terbium-ytterbium codoped fluorogermanate vitroceramic
Author(s): 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
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper 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) → 7FJ(J=6,5,4) and 5D47FJ(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.

Paper Details

Date Published: 19 February 2008
PDF: 5 pages
Proc. SPIE 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII, 687513 (19 February 2008); doi: 10.1117/12.759685
Show Author Affiliations
Artur da S. Gouveia-Neto, Univ. Federal Rural de Pernambuco (Brazil)
Luciano A. Bueno, Univ. Federal Rural de Pernambuco (Brazil)
Raphael F. do Nascimento, Univ. Federal Rural de Pernambuco (Brazil)
Elias A. da Silva, Univ. Federal Rural de Pernambuco (Brazil)
Valberes B. do Nascimento, Univ. Federal Rural de Pernambuco (Brazil)
Ernande B. Costa, Univ. Federal Rural de Pernambuco (Brazil)
Sidney J. L. Ribeiro, Intituto de Química-UNESP (Brazil)
Younes Messaddeq, Intituto de Química-UNESP (Brazil)


Published in SPIE Proceedings Vol. 6875:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII
Peter E. Powers, Editor(s)

© SPIE. Terms of Use
Back to Top