J. Phys. IV France 04 (1994) C4-419-C4-422
Approximate polarization selection rules for the 3P0 → 3H4 transition in Pr: β" alumina single crystalsP.R. NELSON, D.J. VICKERS and O.M. STAFSUDD
Department of Electrical Engineering, University of California, Los Angeles, 56-125B Engineering IV, Los Angeles, CA 90024-1594, U.S.A.
Emission spectra of the 3P0 → 3H4 transition in Pr: β" alumina single crystals excited by both a broad-band blue source and by dye laser excitation at various wavelengths within the inhomogeneously-broadened 3H4 → 3P0 absorption line are considered. These spectra are strongly polarized, and are therefore due to Pr3+ ions in the Beevers-Ross (BR) sites. An approximately-axial model for the crystal field at a BR site predicts crystal field splitting of the 3H4 level and polarization selection rules which approximately match those we have observed.
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