Luminescence spectroscopy of high-energy 4f11 levels of Er3+ in fluorides

Author: Wegh R. T.   Van Loef E. V. D.   Burdick G. W.   Meijerink A.  

Publisher: Taylor & Francis Ltd

ISSN: 1362-3028

Source: Molecular Physics, Vol.101, Iss.7, 2003-01, pp. : 1047-1056

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Abstract

The 4f11 energy levels of Er3+ in LiYF4 in the spectral region 39 000-65 000 cm−1 have been studied. The agreement between experimental energy levels, obtained from luminescence excitation spectra, and calculated energy levels is good. Luminescence originating from high-lying energy levels has been investigated. Emission from the states 4D1/2 (∼47 200 cm−1), 2F(2)7/2 (∼54 700 cm−1) and 2F(2)5/2 (∼63 300 cm−1) is observed. 2F(2)5/2 emission occurs for Er3+ in LaF3, where the 2F(2)5/2 level is situated just below the lowest 4f105d state, but also for Er3+ in LiYF4, where it lies in between the two lowest 4f105d states.

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