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Proceedings Paper

Plasmon enhanced luminescence of Tb3+ doped Li2O-LaF3-Al2O3-SiO2 glass containing Ag nanoparticles
Author(s): P. Piasecki; A. Piasecki; Zhengda Pan; Akira Ueda; R. Aga Jr.; Richard Mu; Steven H. Morgan
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Paper Abstract

Tb3+ and Ag co-doped glass nano-composites are synthesized in a glass matrix Li2O-LaF3-Al2O3-SiO2 (LLAS) by a melt-quench technique. The nucleation and growth of Ag nanoparticles (NPs) were controlled by a thermal annealing process. A broad absorption band peaking at about 420 nm was observed due to surface plasmon resonance (SPR) of Ag NPs. Annealing of glass samples results in the growth of Ag NPs. Photoluminescence (PL) emission and excitation spectra were measured from glass samples with different Ag concentrations and different annealing times. Plasmon enhanced Tb3+ luminescence was observed at certain excitation wavelength regions. Luminescence quenching was observed for samples with high Ag concentration and longer annealing time. Our luminescence results suggest that there are two competitive effects, enhancement and quenching, acting on Tb3+ luminescence in the presence of Ag NPs. The enhancement of Tb3+ luminescence is mainly attributed to local field effects: the SPR of Ag NPs causes an intensified electromagnetic field around the NPs, resulting in enhanced optical transitions of Tb3+ ions in the vicinity. The quenching effect in the presence of Ag NPs suggests an energy transfer from Tb3+ ions to Ag NPs. The competition between the plasmonic enhancement and the quenching effect is discussed for samples with different Ag concentrations and annealing times.

Paper Details

Date Published: 10 September 2010
PDF: 7 pages
Proc. SPIE 7757, Plasmonics: Metallic Nanostructures and Their Optical Properties VIII, 77572M (10 September 2010); doi: 10.1117/12.863061
Show Author Affiliations
P. Piasecki, Fisk Univ. (United States)
A. Piasecki, Fisk Univ. (United States)
Zhengda Pan, Fisk Univ. (United States)
Akira Ueda, Fisk Univ. (United States)
R. Aga Jr., Fisk Univ. (United States)
Richard Mu, Fisk Univ. (United States)
Steven H. Morgan, Fisk Univ. (United States)

Published in SPIE Proceedings Vol. 7757:
Plasmonics: Metallic Nanostructures and Their Optical Properties VIII
Mark I. Stockman, Editor(s)

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