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Spectra and energy levels of Yb3+ in AlN

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6 Author(s)
Koubaa, T. ; Département de Physique, Groupe de Physique Théorique, Laboratoire de Physique Appliquées, Faculté des Sciences de Sfax, Sfax 3018, Tunisia ; Dammak, M. ; Kammoun, M. ; Jadwisienczak, W.M.
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We report on the crystal-field energy levels calculation of Yb3+ ions in an AlN host using crystal-field theory. Cathodoluminescence spectra of AlN grown by molecular beam epitaxy on Si (0001) substrate and doped by implantation with ytterbium (Yb) ions were critically examined assuming that Yb3+ ions are involved in different sites. The comparison between the emission spectra of Yb3+ ions in the GaN and AlN indicates the presence of some similarities between the lattice locations of Yb3+ ions in these hosts. We demonstrate that assuming the existence of a substitutional YbAl(Ga) site and a VN-Yb complex defect in AlN (GaN) lattice, a good agreement between the measured and calculated energy values of Yb3+ ion transition lines can be obtained. Furthermore, we have investigated the Zeeman g|| and g parameters for the Yb3+ ion in an Al substitutional site as well as in the VN-Yb complex using the perturbation theory.

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Journal of Applied Physics  (Volume:106 ,  Issue: 1 )