ФТТ, 2005, том 47, выпуск 8

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VUV-luminescence and excitation spectra of the heavy trivalent rare earth ions in fluoride matrices

M.Kirm *,**, V.N.Makhov ***, M.True *, S.Vielhauer *, G.Zimmerer *

* Institut fur Experimentalphysik, University of Hamburg,
D-22761 Hamburg, Germany
** Institute of Physics, University of Tartu,
51014 Tartu, Estonia
*** P.N. Lebedev Physical Institute, Russian Academy of Sciences,
119991 Moscow, Russia
E-mail: georg.zimmerer@desy.de

VUV 4fn->4fn-15d transitions of Gd3+, Er3+, Tm3+, and Lu3+ in fluoride matrices have been analysed with high-resolution luminescence and excitation spectroscopy. In trifluorides, strong electron-phonon coupling has been found. In the other matrices, the luminescence spectra clearly yield zero-phonon lines and phonon replica, indicating intermediate coupling. The energies of the zero-phonon lines observed are compared with theoretical predictions. Near the threshold of f-> d excitations, some of the excitation spectra yield sharp structures which cannot be explained with phonon replica but will be discussed in terms of the energy levels of the 4fn-15d configuration.

The work was supported by the Minister of Science and Technology of Germany under contracts 05 KS1GUD/1 and 03N8019D. Support by the Graduiertenkolleg Felder und lokalisierte Atome--Atome und lokalisierte Felder of the Deutsche Forschungsgemeinschaft (GRK 403) is gratefully acknowledged.

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