Luminescence spectroscopy of high-energy 4f11 levels of Er3+ in fluorides
Titel:
Luminescence spectroscopy of high-energy 4f11 levels of Er3+ in fluorides
Auteur:
WEGH, R.T. VAN LOEF, E.V. D. BURDICK, G.W. MEIJERINK, A.
Verschenen in:
Molecular physics
Paginering:
Jaargang 101 (2003) nr. 7 pagina's 1047-1056
Jaar:
2003-04-10
Inhoud:
The 4f11 energy levels of Er3+ in LiYF4 in the spectral region 39000-65000 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 200cm-1), 2F(2)7/2 (∼54700cm-1) and 2F(2)5/2 (∼63 300cm-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.