High resolution Fourier transform spectroscopy and crystal-field analysis in Tm,Ho:BaY2F8

Year: 2005

Authors: Baraldi A., Capelletti R., Mazzera M., Riolo P., Amoretti G., Magnani N., Sani E., Toncelli A., Tonelli M.

Autors Affiliation: INFM-CNR and Dipartimento di Fisica, Università di Parma, Parco Area delle Scienze 7A, 43100 Parma, Italy;
NEST-INFM-CNR and Dipartimento di Fisica, Università di Pisa, Via Buonarroti 2, 50127 Pisa, Italy

Abstract: A Tm3+- Ho3+ -codoped single crystal of monoclinic BaY2F8 has been characterized by means of high resolution FTIR spectroscopy in the wave number range 2000 – 24000 cm–1 and in the temperature range 9 –300 K. The energy level schemes of the two lanthanide ions as determined by the optical absorption spectra is presented, analyzed, and fitted within a single ion Hamiltonian model. The very small energy separation (about 0.6 – 1.6 cm–1) measured between the first and second sublevels of the ground state manifolds for both the ions is in line with the theoretical predictions. The impurity-phonon coupling is put into evidence by the thermally induced line shift and broadening, and by the detection of vibronic replicas of a few lines.

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Volume: 2 (1)      Pages from: 248  to: 251

KeyWords: Hamiltonians; Impurities; Light absorption; Mathematical models; Phonons, Impurity-phonon coupling; Lanthanide ions, Fourier transform infrared spectroscopy
DOI: 10.1002/pssc.200460157

Citations: 9
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