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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Infrared-to-visible upconversion in Yb~(3+)/Er~(3+) co-doped PbO-GeO_2 glass with silver nanoparticles
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Infrared-to-visible upconversion in Yb~(3+)/Er~(3+) co-doped PbO-GeO_2 glass with silver nanoparticles

机译：含银纳米粒子的Yb〜（3 +）/ Er〜（3+）共掺杂PbO-GeO_2玻璃的红外至可见光上转换

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摘要

Enhanced frequency upconversion (UC) emission was studied in Yb ~(3+)/Er~(3+) co-doped PbO-GeO_2 glass containing silver nanoparticles (NPs). Optical excitation was achieved with a laser operating at 980 nm in resonance with the Yb~(3+) transition ~4F_(5/2) → ~4F_(7/2). The intensity of the whole UC spectrum from 400 to 700 nm was intensified due to the influence of silver NPs. The green and red emissions were enhanced by more than 300%. Emission bands centered at 408 nm and 480 nm were also detected corresponding to the ~2H_(9/2) → ~4I_(15/2) and ~4F_(7/2) → ~4I_(15/2) transitions of Er~(3+) ion. An intensity enhancement of ～ 150% due to the NPs was measured. For the first time the influence of silver NPs on the blue emission of Yb~(3+)/Er~(3+) co-doped PbO-GeO_2 glass is reported. The large enhancement in the whole UC spectrum is due to the increased local field in the Er~(3+) ions locations and the proximity between the luminescence wavelengths and the NPs surface plasmon resonance.
机译：在Yb〜（3 +）/ Er〜（3+）共掺杂的含银纳米粒子（NPs）的PbO-GeO_2玻璃中研究了增强的上变频发射。用在980nm下工作的激光在Yb〜（3+）跃迁〜4F_（5/2）→〜4F_（7/2）的共振下实现了光激发。由于银纳米颗粒的影响，整个UC光谱的强度从400纳米增加到700纳米。绿色和红色排放增加了300％以上。还检测到以408 nm和480 nm为中心的发射带，对应于Er ~~ 2H_（9/2）→〜4I_（15/2）和〜4F_（7/2）→〜4I_（15/2）跃迁。 （3+）离子。测得由于NP导致的强度增强〜150％。首次报道了银纳米颗粒对Yb〜（3 +）/ Er〜（3+）共掺杂PbO-GeO_2玻璃蓝光发射的影响。整个UC光谱的大幅提高归因于Er〜（3+）离子位置中增加的局部电场以及发光波长与NPs表面等离子体激元共振之间的接近性。

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