Luminescence study of the 4fsup(2)5d configuration of Ndsup(3+) in LiYFsub(4), LiLuFsub(4) and BaYsub(2)Fsub(8) crystals
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Journal of Luminescence
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Ultraviolet fluorescence of Nd3+ ions induced by triphotonic excitation process was studied in Nd-doped LiYF4,
LiLuF4 and BaY2F8 crystals using a technique of time-resolved spectroscopy. The observed ultraviolet luminescence
was due to transitions between the bottom of 4f
2
5d configuration and 4f 3 states of Nd3+ ions. Narrow emission lines
superposed to the broadband emissions were observed. A detailed analysis of luminescence spectrum revealed that the
narrow emissions are due to parity and spin allowed radiative transitions from the Stark levels of 4
K11/2(5d) state
created by the electrostatic interaction between the 5d electron and the two electrons of the 4f
2 configuration. The
narrow emissions are related to the high spin state (S ¼ 3=2) which gives f–f characteristics to the f–d broadband
emissions. The narrow emissions superposed to the wide emission correspond to 18%, 34% and 43% of the integrated
broadband emission at 262 nm observed in LiYF4, LiLuF4 and BaY2F8 crystals, respectively. Although the 5d–4f
2
interaction is observed to be weaker than 5d-crystal field interaction, it is stronger enough to select only the radiative
transitions from 4f
2
5d configuration to 4f
3 states that preserves the total spin S ¼ 3=2.
Como referenciar
LIBRANTZ, ANDRE F.H.; GOMES, LAERCIO; BALDOCHI, SONIA L.; RANIERI, IZILDA M.; BRITO, G.E. Luminescence study of the 4fsup(2)5d configuration of Ndsup(3+) in LiYFsub(4), LiLuFsub(4) and BaYsub(2)Fsub(8) crystals. Journal of Luminescence, v. 121, p. p. 137-148, 2006. DOI: 10.1016/j.jlumin.2005.11.004. Disponível em: http://repositorio.ipen.br/handle/123456789/7733. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.