Plasmon enhanced luminescence of Tb~(3+) doped Li2O-LaF3-Al2O3-SiO2glass containing Ag nanoparticles

机译：含银纳米粒子的Tb〜（3+）掺杂Li2O-LaF3-Al2O3-SiO2 r n玻璃的等离子体增强发光

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Tb~(3+) 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 Tb~(3+) 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 Tb~(3+) luminescence in the presence of Ag NPs. The enhancement of 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 Tb~(3+) ions in the vicinity. The quenching effect in the presence of Ag NPs suggests an energy transfer from Tb~(3+) 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.

机译：通过熔融淬火技术在玻璃基体Li2O-LaF3-Al2O3-SiO2（LLAS）中合成了Tb〜（3+）和Ag共掺杂的玻璃纳米复合材料。 Ag纳米粒子（NPs）的成核和生长是通过热退火工艺控制的。由于Ag NP的表面等离振子共振（SPR），观察到在约420nm处达到峰值的宽吸收带。玻璃样品的退火导致Ag NP的生长。从具有不同银浓度和不同退火时间的玻璃样品中测量了光致发光（PL）发射光谱和激发光谱。在某些激发波长区域观察到等离子体增强的Tb〜（3+）发光。对于高银浓度和较长退火时间的样品，观察到发光猝灭。我们的发光结果表明，在存在银纳米颗粒的情况下，Tb〜（3+）发光有两个竞争效应，增强和猝灭。发光的增强主要归因于局部场效应：Ag NPs的SPR导致NPs周围的电磁场增强，从而导致附近Tb〜（3+）离子的光学跃迁增强。 Ag NPs存在下的猝灭作用表明能量从Tb〜（3+）离子转移到Ag NPs。对于具有不同Ag浓度和退火时间的样品，讨论了等离子体增强和猝灭效果之间的竞争。

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《Plasmonics: Metallic nanostructures and their optical properties VIII》|2010年|p.77572M.1-77572M.7|共7页
会议地点 San Diego CA(US)
作者
P. Piasecki; A. Piasecki; Z. Pan; A. Ueda; R. Aga Jr; R. Mu; S. H. Morgan;
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Department of Physics, Fisk University, Nashville, TN, USA 37208;

Department of Physics, Fisk University, Nashville, TN, USA 37208;

Department of Physics, Fisk University, Nashville, TN, USA 37208;

Department of Physics, Fisk University, Nashville, TN, USA 37208;

Department of Physics, Fisk University, Nashville, TN, USA 37208;

Department of Physics, Fisk University, Nashville, TN, USA 37208;

Department of Physics, Fisk University, Nashville, TN, USA 37208;

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原文格式 PDF
正文语种 eng
中图分类金属材料;
关键词
Ag; nanoparticle; SPR; Tb~(3+); luminescence;

机译：银纳米粒子SPR; Tb〜（3+）;发光;

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4. Plasmon enhanced luminescence of Tb~(3+) doped Li_2O-LaF_3-Al_2O_3-SiO_2 glass containing Ag nanoparticles [C] . P. Piasecki, A. Piasecki, Z. Pan, SPIE Conference on Plasmonics: Metallic Nanostructures and Their Optical Properties . 2010

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Plasmon enhanced luminescence of Tb~(3+) doped Li2O-LaF3-Al2O3-SiO2glass containing Ag nanoparticles

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