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Study with Analytical Equations of Absorption Spectra Containing Interference Dips in Fluoride Glasses Doped with Cr 3+

Abstract : The optical absorption of Cr3+-doped fluoride glasses has been investigated. The lowest energy absorption band 4A2 → 4T2 shows distinct interference dips due to spin–orbit coupling between 4T2, 2E and 2T1 excited states. The dips were analyzed using an analytical method proposed by Bussière et al. ( J. Phys. Chem. A 2003, 107, 1258) based on coupled potential energy surfaces. Then a theoretical crystal-field analysis based on the Racah tensor algebraic method was carried on Cr3+ ions occupying octahedral site symmetry in the fluoride glasses. Satisfactory correlations were obtained between the experimental and calculated energy levels. The fitting of the interference dips also provided a measure of the spin–orbit coupling constant for Cr3+ in fluoride glasses, intermediate between the theoretical value calculated for a fluoride crystal and the value deduced from Racah parameters.
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https://hal-univ-lemans.archives-ouvertes.fr/hal-02146706
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Soumis le : mardi 4 juin 2019 - 11:04:11
Dernière modification le : mardi 18 janvier 2022 - 11:56:21

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Olfa Maalej, O. Taktak, Brigitte Boulard, S. Kammoun. Study with Analytical Equations of Absorption Spectra Containing Interference Dips in Fluoride Glasses Doped with Cr 3+. Journal of Physical Chemistry B, 2016, 120 (30), pp.7538-7545. ⟨10.1021/acs.jpcb.6b03230⟩. ⟨hal-02146706⟩

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