Intensities of 4f-4f transitions in glass materials

Química Nova

Oscar L. Malta²  Luís D. Carlos¹ 

[1] ,Universidade Federal de Pernambuco Centro de Ciências Exatas e da Natureza Departamento de Química FundamentalRecife PE

关键词: rare earth ions;    photoluminescence spectroscopy;    4f-4f intensities;   

DOI  :  10.1590/S0100-40422003000600018

来源: SciELO

【 摘 要 】

In this article we review some of the basic aspects of rare earth spectroscopy applied to vitreous materials. The characteristics of the intra-atomic free ion and ligand field interactions, as well as the formalisms of the forced electric dipole and dynamic coupling mechanisms of 4f-4f intensities, are outlined. The contribution of the later mechanism to the 4f-4f intensities is critically discussed, a point that has been commonly overlooked in the literature of rare earth doped glasses. The observed correlation between the empirical intensity parameter W2 and the covalence of the ion first coordination shell is discussed accordingly to the theoretical predictions.

【 授权许可】

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