Fine structure of V2+ energy levels in CsCaF3:V2+

Theoretical investigations of the fine structure of the lasing 4T2g level in a CsCaF3:V2+ crystal were carried out. The spin-orbit splitting of the 4T2g term in the static low crystal field was obtained from the Eisenstein matrices and using parameters (Dq, B, C, ζSO) appropriate for the 4T2g-4A2g zero-phonon line. The 4T2g spinor splitting has been modeled by the second-order spin-orbit Hamiltonian. The effect of the dynamical Jahn-Teller interaction on the spin-orbit splitting of the 4T2g term was taken into account; the Jahn-Teller stabilization energy, ZPL splitting and the Huang-Rhys parameter for the eg normal mode were all evaluated