Crystal-field analysis ofEu3+-doped yttrium aluminum garnet by site-selective polarized spectroscopy

Effect of grain size and concentration of active ions on structural and optical behavior of Eu3+-doped Y3Al5O12 nanocrystallites

“…Especially with low Eu 3+ concentrations, emission from the higher 5 D levels, predominantly the 5 D 1 -7 F 0-4 transitions, are present. The 5 D 1 emission could be observed even with 5 mol % of Eu 3+ as revealed by the good match between the calculated 5 D 1 -7 F 3,4 lines [13] and the observed spectra. However, not all transitions could be explained with the 5 D 0,1 [14].…”

Spectra, energy levels, and symmetry assignments for Stark components of Eu3+(4f6) in gadolinium gallium garnet (Gd3Ga5O12)

“…The crystal-field splitting analysis of Eu 3 þ in Y 3 Al 5 O 12 (YAG) reported by Gross et al [21] involved site-selective polarized spectroscopy to identify both the energy and irreducible representation (irrep) for individual Stark levels. More recently, Binnemans and Görller-Walrand [22,27,28] analyzed the absorption spectra and magnetic circular dichroism (MCD) spectra, and modeled the crystal-field splitting of Eu 3 þ doped into single-crystal Y 3 Ga 5 O 12 (YGG).…”

“…The emission cross sections and relatively long fluorescence lifetimes associated with the Eu 3 þ (4f 6 ) transitions from the 5 D 0,1,2 levels to the ground-state multiplets 7 F J have made it possible to develop components for numerous photonic devices and optical displays [12][13][14][15][16][17][18][19][20][21][22][23]. Reviews of earlier work on the spectroscopic analysis of the crystal-field splitting of the energy levels of Eu 3 þ (4f 6 ) doped into single-crystal cubic garnets have been reported by several groups of Refs.…”

Optical and magnetooptical properties of Ho3+:YGG

“…As a result of this behavior for the Stark splitting of the ground 4f ( n ) ‐configuration multiplets in these ions, the optical spectra are usually characterized by significant discrepancies between the experimental data and theoretical calculations regarding the number of lines and the intensity distribution among these lines (see also Refs. 8–10). On the other hand, the complicated behavior of the observed optical spectra may be caused by the overlapping of the optical transitions in the RE ions, occupying crystallographically non‐equivalent positions in the D 2 symmetry sites, and differing by the orientation of the local coordinate axes 4, 5, 8–10 in the cubic garnet structure.…”