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arXiv 0803.3470cond-mat.mtrl-sci
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透明高功率陶瓷Laser材料的三维晶界谱

Three-Dimensional Grain Boundary Spectroscopy in Transparent High Power Ceramic Laser Materials

Mariola O. Ramirez, Jeffrey Wisdom, Haifeng Li, Yan Lin Aung, Joseph Stitt, Gary L. Messing, V. Dierolf, Zhiwen Liu, Akio Ikesue, Robert L. Byer, Venkatraman Gopalan

摘要:

利用共焦拉曼光谱和荧光光谱成像在3维,我们显示了直接的证据,Nd 3 +-Nd 3+的相互作用,在Nd 3+:YAG激光陶瓷的晶界(GB)。它清楚地表明,Nd 3+偏析发生在GBs导致自荧光淬灭,其影响高达20%的体积分数。此外,我们表现出一个明显的趋势,增加空间不均匀性的Nd 3+浓度时,掺杂水平超过3原子%,这是没有检测到的标准光谱技术。这些结果可能为进一步改进已经令人印象深刻的陶瓷激光材料指明了方向。

英文摘要:

Using confocal Raman and fluorescence spectroscopic imaging in 3-dimensions, we show direct evidence for Nd3+-Nd3+ interactions across grain boundaries (GBs) in Nd3+:YAG laser ceramics. It is clearly shown that Nd3+ segregation takes place at GBs leading to self-fluorescence quenching which affects a volume fraction as high as 20%. In addition, we show a clear trend of increasing spatial inhomogeneities in Nd3+ concentration when the doping levels exceeds 3 at%, which is not detected by standard spectrometry techniques. These results could point the way to further improvements in what is already an impressive class of ceramic laser materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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