Absorption intensities and emission cross section of intermanifold transition of Er3+ in Er3+:Y2O3 nanocrystals

The room temperature absorption intensities of Er3+(4f11) transitions in synthesized Er3+:Y2O3 nanocrystals have been analyzed using the Judd-Ofelt (J-O) model in order to obtain the phenomenological intensity parameters. The J-O intensity parameters are subsequently used to determine the radiative...

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Published in:Journal of applied physics 2007-06, Vol.101 (11)
Main Authors: Sardar, Dhiraj K., Nash, Kelly L., Yow, Raylon M., Gruber, John B.
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Language:English
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description The room temperature absorption intensities of Er3+(4f11) transitions in synthesized Er3+:Y2O3 nanocrystals have been analyzed using the Judd-Ofelt (J-O) model in order to obtain the phenomenological intensity parameters. The J-O intensity parameters are subsequently used to determine the radiative decay rates, radiative lifetimes, and branching ratios of the Er3+ transitions from the upper multiplet manifolds to the corresponding lower-lying multiplet manifolds LJ2S+1 of Er3+(4f11). The emission cross section of the important intermanifold Er3+ I13∕24→I15∕24 (1.5μm) transition has been determined. The room temperature fluorescence lifetime of this transition in Er3+:Y2O3 nanocrystals was measured. From the radiative lifetime determined from the J-O model and measured fluorescence lifetime, the quantum efficiency of this material was determined. The comparative study of Er3+(4f11) ions suggests that synthesized Er3+:Y2O3 nanocrystals could be an excellent alternative to single crystal Er3+:Y2O3 for certain applications especially in the near infrared region.
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title Absorption intensities and emission cross section of intermanifold transition of Er3+ in Er3+:Y2O3 nanocrystals
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