Magnetooptics of quintet states of Tb³⁺ ion in terbium–yttrium aluminum garnet

Abstract

The luminescence spectra and the degrees of magnetic circular polarization of luminescence (MCPL) have been studied in paramagnetic garnet Тb 0.2 Y 2.8 Al 5 O 12 (YAG : Тb

Nonequilibrium population distribution in excited electronic states of Tb3+ in Y3Al5O12

“…9 In this case, due to remagnetization, the inversion of the Zeeman sublevels of the ͑⌫ 1 , ⌫ 3 ͒ doublet ͑see also Fig. This is allowed according to selection rules.…”

Magnetooptics of the luminescent transitions in Tb3+:Gd3Ga5O12

“…2 allows us to obtain so-called ''pure'' |J,M J i states of some quasi-doublet ones of the ground and excited multiplets of Tb 3+ ion in the garnet structure, which greatly simplifies an interpretation of the magnetic [5] and magnetooptical [9,[14][15][16][17]23,25] properties of the terbiumcontaining paramagnetic garnets.…”

“…However, the mixed garnet system Tb x Y 3Àx Al 5 O 12 (TbYAG) and Tb 3 Ga 5Àx Al x O 12 [29] can be a good alternative to TbGG to be used in the devices of applied magnetooptics. For example, among the Tb-doped garnets (gallates and aluminates) we have studied [9,[14][15][16][17]23], the maximal value of magnetooptical effect of the intensity change of luminescence line arises in the Tb 0.2 Y 2.8 Al 5 O 12 system at the low temperatures in the comparatively small magnetic fields. Namely this garnet posses by the unique set of optical and mechanical properties: a high transparency in the wide spectral region (from 190 nm to 2400 nm), very bright ''green'' luminescence [16,30,31] and good mechanical properties [30].…”

“…In this case, according to the symmetry rules [4,12,[14][15][16][17], the initial states of emission magneto-optically active transitions: It is well-known that terbium gallium (TbGG) and terbium-yttrium gallium (TbYGG) garnet materials are now being used to produce effective optical isolators (and modulators) in the visible and near infrared spectral region [26]. TbGG crystals exhibit a fairly high Verdet constant and a good optical transparency in the range from 400 to 1400 nm [27].…”

Preparation of (Tb0.8Y0.2)3Al5O12 transparent ceramic as novel magneto-optical isolator material

“…In 1988, Ce 3+ -doped YIG was investigated and its magnetooptical properties were found to be more efficient than those of Bi:YIG [19] . Previous works have also investigated Tb 3+ -doped Y 3 Al 5 O 12 (YAG) [20,21] . composition.…”