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

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

2008-03-24

arxiv.org/abs/0803.3470v1

Physics

Condensed Matter

Materials Science

8 pages including Figures. submitted to Optics Express (Nov 07)

Scientific paper

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.

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