Two‐Photon Luminescence Excitation Spectra of Eu³⁺ in Yttrium Aluminium Garnet

Abstract

The results are reported of the first study of the 5D, manifold of Eu3+ in the noninversion and inversion centres of YAG using the method of two-photonluminescence excitation. Based on the number of Stark components and the two-photon polarization dependences it is shown that the set of Stark components of 5D multiplet corresponds to tetragonal local symmetry. The components of 5D, manifold are identified and the crystal field parameters are found for the noninversion centre. The europium ion distribution over the centres is determined showing that a t least 60% of the ions are in the inversion centre.

Spectroscopic study of Eu3+ ions in heavy metal fluoride and oxide glasses

“…The trivalent europium ion is one of the most important of the rare earth ions because of its application as a spectroscopic probe, which can provide information on the structure, nature of the chemical bonds and properties of optical materials like fluoride [8,9] and oxide [10,11] glasses as well as other ordered [12] and disordered [13] crystalline systems. The effect of surrounding ions on the luminescence of europium in glass has been reported in several works, which clearly indicate that the relative intensities of the Eu 3+ emissions depend strongly on the host glass types and excitation wavelengths [14].…”