Study of the line intensity in the optical and magnetooptical spectra in holmium-containing paramagnetic garnets

Abstract Studies of line intensity in the optical and magneto-optical spectra in the holmium-containing paramagnetic garnet Ho 3+ :YAG were carried out within the visible spectrum at T = 85 K. Detailed investigation of the magnetic circularly polarized luminescence spectra at 85 and 300 K on 5 S 2 → 5 I 8 emission transition in Ho 3+ :YAG was carried out. A quasi-doublet state in the energy spectrum of the Ho 3+ ions was observed, characterized by a significant magneto-optical activity, which is caused by a large Zeeman splitting of the quasi-doublet. The measurement of the magnetic circular polarized luminescence spectrum carried out within one of the emission lines of the luminescence band 5 S 2 → 5 I 8 in Ho 3+ :YAG at 85 K shows significant magneto-optical effects of the intensity change of the emitted light, compared to that measured for the other emission lines in the same luminescent band.