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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 >Effect of alkali halides on the persistent spectral hole burning in Ge-Ga-S glasses doped with Eu3+
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Effect of alkali halides on the persistent spectral hole burning in Ge-Ga-S glasses doped with Eu3+

机译：碱金属卤化物对掺Eu3 +的Ge-Ga-S玻璃中持久光谱孔燃烧的影响

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摘要

Addition of CsBr and KBr into Eu3+-doped Ge-Ga-S glasses resulted in persistent spectral hole burning with high quantum efficiency, whereas the addition of alkali chloride did not show any evidence for a hole formation process. The characterization of the phonon side band spectra revealed the site for Eu3+ ions located near the Ga-Br- or Ga-Cl(-)units. The presence of Br- ions near Eu3+ lowers the energy of the conduction band, thereby enabling the interaction between the 4f electrons and the resultant conduction band. The interaction made the photo-reduction of Eu3+ to Eu2+ possible. However, the higher coupling of phonon energy with Eu3+ together with the higher electronegativity of Cl(-)ion in CsCl-containing glass compared to its CsBr counterpart, hindered the photo-reduction of Eu3+ into Eu2+. (C) 2003 Published by Elsevier B.V. [References: 14]
机译：将CsBr和KBr添加到掺Eu3 +的Ge-Ga-S玻璃中会导致光谱持久燃烧，并具有高量子效率，而添加碱金属氯化物则没有任何证据表明存在空穴形成过程。声子边带谱的表征揭示了位于Ga-Br-或Ga-Cl（-）单元附近的Eu3 +离子的位点。 Eu3 +附近的Br-离子的存在会降低导带的能量，从而使4f电子与生成的导带相互作用。相互作用使得将Eu3 +光还原为Eu2 +成为可能。但是，与含CsCl的玻璃相比，声子能量与Eu3 +的更高耦合以及Cl（-）离子在CsBr玻璃中的更高的负电性阻碍了Eu3 +的光还原为Eu2 +。 （C）2003年由Elsevier B.V.出版[参考文献：14]

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