Magnetic circular dichroism of Nd3+ and Yb3+ ions in LiNbO3 crystals

Abstract

Magnetic circular dichroism (MCD) of trivalent rare earth doped lithium niobate crystals is reported for the first time. Magneto-optical signals of Nd3+ and Yb3+ ions have been studied at 2 K as a function of the magnetic field strength up to 5 T. This study allows the identification of the Zeeman sublevels of these ions, which can be labeled by irreducible representations (Γ4, Γ5, or Γ6), so that the sign and allowance of transitions can be predicted. From the dependence of suitable MCD spectral lines on the magnetic field strength, the effective gyromagnetic factor of the ground state has been determined for both ions: (gNd)∥=1.4±0.1 and; (gYb)∥=4.7±0.1.

Spontaneous Emission and Nonlinear Response Enhancement by Silver Nanoparticles in a Nd3+‐Doped Periodically Poled LiNbO3 Laser Crystal

“…In our case the spectra were taken in unpolarized α configuration, that is, the beam parallel to the crystallographic c ‐axis of LiNbO 3 . Forced electric‐dipole character has been confirmed for the Nd 3+ Stark transitions, owing to the non‐inversion C 3 local symmetry site of Nd 3+ ions in LiNbO 3 23. We confirmed that the shape of the Nd 3+ emission spectrum was not affected by the Ag NP distribution, which indicates that in this α configuration the character of the Stark transitions was not altered by the interaction with the metallic nanostructures.…”

Electron paramagnetic resonance and electron‐nuclear double resonance of nonequivalent Yb3+ centers in stoichiometric lithium niobate

“…The splitting observed in low-temperature emission spectra [5] was considered as proof that Yb 3+ occupies more than one site in LN. Magnetic circular dichroism (MCD) [6] confirmed the crystal field quantum numbers and g-factor values obtained earlier. In the EPR study of Yb doped LN and LN codoped with Mg [7], two hyperfine satellites with a splitting of about 67 mT were observed for B || z.…”

Multifrequency spectroscopy of laser active centers Nd3+ and Yb3+ in nearly stoichiometric LiNbO3

“…The presence of NEC has been related to the defects associated with non-stoichiometry of LN. Similar results were also obtained for LN:Yb system [1,4,5,[10][11][12].…”