Artículos de revistas
Absorption and fluorescence of Er3+-doped LiYF4: Measurements and simulation
Fecha
1998-07-24Registro en:
Journal of Alloys and Compounds, v. 275-277, p. 435-441.
0925-8388
10.1016/S0925-8388(98)00363-6
WOS:000075617700097
2-s2.0-0001076335
Autor
CNRS UPR 209
Université du Maine
Laboratoire de Radiochimie-IPN
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Er3+:LiYF4 single crystal has been studied by absorption and fluorescence spectroscopy in the IR-visible-UV (0-44000 cm-1) region from 4.2 K to room temperature. Polarized spectra were recorded in order to assign numerous Stark levels of electronic transitions mentioned but not attributed before in the related literature and to discuss the irreducible representations (irreps) of the 4I15/2 sublevels. A parametric hamiltonian, including free ion (Eν, α, β, γ, Tλ, ζ, Mk and Pi) and crystal field parameters (B2 0, B4 0, B4 4, B6 0 and B6 4) in an approximate D2d symmetry for the rare earth site in this scheelite type structure, was used to simulate 109 energy positions of the Er ion with a r.m.s. standard deviation of 14.6 cm-1. A comparison with previously published results for Nd3+ in the same matrix is done. © 1998 Elsevier Science S.A.