@article{5958,
  author = {J. P. R. Wells and M. Yamaga and N. Kodama and T. P. J. Han},
  title = {Polarized laser spectroscopy and crystal-field analysis of Er3+ doped CaGdAlO4},
  abstract = {A single Er3+ centre in CaGdAlO4:Er3+ has been identified to have C-4v symmetry from polarized laser selective excitation. This is consistent with isovalent substitution of the Er3+ ions for host crystal Gd3+ ions. Using both optical and infrared absorption and polarized laser excited fluorescence, 59 crystal-field energy levels and their wavefunction symmetries have been identified and used to perform comprehensive single electron crystal-field analyses for the Er3+ ion centre. For excitation of the F-4(9/2) multiplet, blue and green upconversion fluorescence is observed. Self-absorption dips recorded in upconversion excitation spectra are indicative of the presence of radiative energy transfer processes.},
  year = {1999},
  journal = {Journal of Physics-Condensed Matter},
  volume = {11},
  number = {39},
  pages = {7545-7555},
  month = {Oct 4},
  isbn = {0953-8984},
  doi = {10.1088/0953-8984/11/39/310},
  language = {eng},
}