Crystal field splittings and luminescence properties for Nd3+, Er3+ and Dy3+ in yttrium orthoaluminate (YAlO3) |
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Authors: | KK Deb |
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Institution: | Research Division, U.S. Army Night Vision & Electro-Optics Laboratory, Ft. Belvoir, VA 22060, U.S.A. |
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Abstract: | This report contains information appropriate for a theoretical analysis of the optical spectra of triply ionized lanthanides in YAlO3. Starting with the best-fit crystal field parameters, the crystal field splitting schemes, multiplet-to-multiplet line strengths, radiative lifetimes, branching ratios, line-to-line square matrix elements and g-factors for the triply ionized Nd, Er and Dy in YAlO3 have been calculated. In this paper detailed discussions were made on the luminescence properties of the principal transitions of Nd-doped YAlO3 emanating from the metastable 4F state to Stark components of multiplets of the ground 4IJ term and compared to similar results of Y3Al5O12 (YAG). The line-to-line branching ratios were calculated including J-mixing effects. In the calculations, only electric dipole transitions were considered because of odd-parity. The results predicted some interesting differences in the optical behavior of Nd3+ in these two host materials. It has been observed that there is a reasonable agreement between the theoretical data and those reported experimentally for YAlO3 and YAG. The theoretical studies undertaken here were chosen to supplement or extend the optical data for these two host materials. |
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