In this article the present state of knowledge of the theory of one-and two-photon processes
observed in rare earth ions in crystals is presented. The conclusions are based on the …

The year 2012 marked the golden anniversary of the Judd‐Ofelt (J‐O) theory as a tool used
widely for the theoretical description of the spectroscopic properties of the lanthanide …

The original Judd-Ofelt theory is briefly presented in the terms of effective operators defined
in the traditional form that has been used for many years for the interpretation of the f spectra …

The results of numerical analysis performed for the electric dipole transitions observed in
Eu3+ in the host with C symmetry are presented. The discussion is focused on the one …

The behavior of various contributions to the f↔ f transition amplitude defined up to the third
order in perturbation theory is analyzed. Main attention is paid to the third‐order …

The standard Judd–Ofelt theory of one photon electric dipole transitions in fN systems is
discussed in the language of the one particle parametrization scheme. An overview of …

Very well known difficulties of the theoretical description of the f↔ f electric dipole transitions
of lanthanides are addressed in the old language of the standard Judd–Ofelt (J–O) theory …

A method of analysis of the influence of electron correlation and crystal field on single-beam
two-photon absorption amplitudes is presented. The approach is based on the double …

The values of intensity parameters for the Pr+ 3 ion in LaAlO3, NdAlO3, and LaCl3 hosts
evaluated with complete ab initio calculations based on the third‐order f↔ f transition theory …

Optical intensity data available from axial and polarized orthoaxial absorption
measurements on single crystals of trigonal Na 3 [Nd (oxydiacetate) 3]· 2NaClO 4· 6H 2 O …