Spectroscopic study of optical centers formed in Bi-, Pb-, Sb-, Sn-, Te-, and In-doped germanate glasses.
Spectroscopic study of optical centers formed in Bi-, Pb-, Sb-, Sn-, Te-, and In-doped germanate glasses.
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DOI：
10.1364/ol.33.002131
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发表时间：
2008-09
期刊：
影响因子：
3.6
通讯作者：
M. Sharonov;A. Bykov;V. Petričević;R. Alfano
中科院分区：
文献类型：
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作者：
M. Sharonov;A. Bykov;V. Petričević;R. Alfano
我们已经表明，宽带近红外（NIR）荧光最近发现的Bi掺杂的玻璃是不具体的，仅仅由于Bi离子。掺杂不同6p（Bi，Pb）和5 p（Sn，Sb）离子的玻璃表现出非常相似的行为，其特征在于在二维激发-发射图中观察到四个主要光谱峰，亚稳态能级的寿命约为400 μ s。我们的研究结果挑战了现有的Bi掺杂玻璃中的光学中心模型。提出了由6p（Bi，Pb）和5 p（Sn，Sb）离子引起的点缺陷光学中心，用于解释这些激光材料的近红外发射。
We have shown that the broadband near-IR (NIR) fluorescence recently discovered in Bi-doped glasses is not specific due solely to Bi ions. Glasses doped with different 6p (Bi, Pb) and 5p (Sn, Sb) ions exhibit very similar behavior characterized by four major spectral peaks observed in two-dimensional excitation-emission plots and the lifetime of metastable level of about 400 micros. Our results challenge the existing models of optical centers in Bi-doped glasses. Point defect optical centers caused by the presence of 6p (Bi, Pb) and 5p (Sn, Sb) ions are proposed for the explanation of NIR emission in these laser materials.