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Judd-Ofelt analysis and emission quantum efficiency of Tb-fluoride single crystals: LiTbF4 and Tb0.81Ca0.19F2.81
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10.1063/1.4807649
/content/aip/journal/jap/113/20/10.1063/1.4807649
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/20/10.1063/1.4807649

Figures

Image of FIG. 1.
FIG. 1.

(Up) As-grown LiTbF (a) and TbCaF (b) single crystals. (Down) Cut and polished [100] oriented LiTbF and TbCaF disks used for the optical measurements.

Image of FIG. 2.
FIG. 2.

Coordination polyhedra of Tb in (a) LiTbF and (b) TbCaF single crystals.

Image of FIG. 3.
FIG. 3.

UV-VIS (a) and near IR (b) polarized absorption spectra of LiTbF.

Image of FIG. 4.
FIG. 4.

UV-VIS-IR averaged absorption cross section of LiTbF and TbCaF.

Image of FIG. 5.
FIG. 5.

RT and LT emission spectra of Tb in (a) LiTbF and (b) TbCaF.

Image of FIG. 6.
FIG. 6.

Measured and calculated emission cross-sections of the DF transition in LiTbF and TbCaF for ((a) and (c)) and ((b) and (d)) polarization.

Image of FIG. 7.
FIG. 7.

RT and LT time-resolved luminescence of the TbDF transition after pulsed excitation at 355 nm for LiTbF and TbCaF. Lifetimes were estimated by fitting single exponential decay curves.

Image of FIG. 8.
FIG. 8.

Energy level diagram indicating excitation and emission transitions of Tb in LiTbF. Comparison between RT and LT spectra: (a) excitation in theD multiplet (  = 544.5 nm), and(b)–(h) visible emissions D → F (  = 368 nm).

Image of FIG. 9.
FIG. 9.

Raman spectra of LiTbF and TbCaF at RT.

Tables

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Table I.

Sellmeier coefficients for the ordinary () and extraordinary () refractive indices of LiTbF and TbCaF.

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Table II.

Measured and calculated average absorption line strengths at RT for Tb in LiTbF and TbCaF. Derived JO parameters and root mean square deviations .

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Table III.

Calculated line strengths, transition probabilities, and branching ratios of Tb in LiTbF and TbCaF.

Generic image for table
Table IV.

Stark energy levels of Tb in LiTbF.

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/content/aip/journal/jap/113/20/10.1063/1.4807649
2013-05-24
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Judd-Ofelt analysis and emission quantum efficiency of Tb-fluoride single crystals: LiTbF4 and Tb0.81Ca0.19F2.81
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/20/10.1063/1.4807649
10.1063/1.4807649
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