Nanocomposite Er–Ag silicate glasses
Nanocomposite Er–Ag silicate glasses
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DOI：
10.1088/1464-4258/8/7/s21
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发表时间：
2006-07
影响因子：
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通讯作者：
G. Speranza;S. Bhaktha;A. Chiappini;A. Chiasera;M. Ferrari;C. Goyes;Y. Jestin;M. Mattarelli;L. Minati;M. Montagna;G. N. Conti;S. Pelli;G. Righini;C. Tosello;K. C. Vishunubhatla
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文献类型：
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作者：
G. Speranza;S. Bhaktha;A. Chiappini;A. Chiasera;M. Ferrari;C. Goyes;Y. Jestin;M. Mattarelli;L. Minati;M. Montagna;G. N. Conti;S. Pelli;G. Righini;C. Tosello;K. C. Vishunubhatla
由于众所周知的表面等离子体共振，人们特别关注金属介电纳米结构材料，这种共振被描述为当自由电子被激光照射集体激发时，它们相对于纳米粒子的离子背景的振荡。研究表明，金属纳米粒子可用于提高稀土离子的发光强度。这种效应归因于贵金属纳米颗粒中与表面等离子激元激发相关的强吸收截面和/或被激发纳米颗粒周围产生的大局部场增强。尽管在这个问题上发表了大量的工作，但光学放大的机制仍然存在争议。在这里，我们提出了x射线光电子能谱和透射电子图像，以及光致发光吸收和发射测量，目的是更好地了解银作为铒的增感剂的有效作用。
Particular attention has being given to metal–dielectric nanostructured materials, due to the well known surface plasmon resonance, described as the oscillation of the free electrons with respect to the ionic background of the nanoparticle when they are collectively excited by laser irradiation. It is claimed that metal nanoparticles can be used for increasing the intensity of the luminescence emitted by rare earth ions. This effect is attributed to the strong absorption cross section related to the surface plasmon excitation in noble-metal nanoparticles and/or to the large local field enhancement generated around the excited nanoparticles. In spite of the large amount of work published on this topic, the mechanism of optical amplification remains controversial. Here we present x-ray photoelectron spectra and transmission electron images together with photoluminescence absorption and emission measurements, with the aim of providing a better understanding of the effective role of silver as a sensitizer for erbium.