Optical, Paramagnetic and Endor Spectra of Some Rare-Earth Ions in CaF2

Kiro, D.; Löw, W.

doi:10.1007/978-1-4615-7373-9_13

Cited by 5 publications

(4 citation statements)

References 16 publications

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“…Tables 3-6 show that the energy levels are described sufficiently well (the mean-square deviation cr does not exceed 1 cm-l). Tables 3-6 also show that for Te our results confirmed the values of CF parameters and positions of the energy levels /'6 and F 8 in ground multiplet 2F7/2 [2,3]. For Tte t our results considerably differ from those of reŸ 7.…”

Section: Determining the Potentials Of Crystal Fieldssupporting

confidence: 70%

“…The results of the analysis are given in Tables 3-6. For comparison, they include data of optical [3,5,6] and ENDOR experiments [4,7]. Tables 3-6 show that the energy levels are described sufficiently well (the mean-square deviation cr does not exceed 1 cm-l).…”

Section: Determining the Potentials Of Crystal Fieldsmentioning

confidence: 99%

“…Therefore, in spite of the fact that Yb 3+ has the simplest energy level diagram consisting of two multiplets, 2F7/2 and 2F5/2, and has been extensively studied by various methods -electron paramagnetic resonance (EPR), electron-nuclear double resonance (ENDOR) and optical spectroscopy, including Zeeman spectroscopy -, there has been no unambiguous unraveling of the complex optical spectra and the Stark structure of the numerous PCs formed in this crystal. Exclusively for the cubic PC (Te), energy levels were nearly completely established and the parameters of its crystal field (CF) were determined [2,3]. However, the CF parameters determined from the experimental optical data [2,3] differ from those determined from the hyperfine parameters obtained by ENDOR [4].…”

Section: Introductionmentioning

confidence: 99%

“…Exclusively for the cubic PC (Te), energy levels were nearly completely established and the parameters of its crystal field (CF) were determined [2,3]. However, the CF parameters determined from the experimental optical data [2,3] differ from those determined from the hyperfine parameters obtained by ENDOR [4]. In these papers the positions of the energy tevels I" 6 and F 8 in the ground multiplet 2F7/2 also differ.…”

Section: Introductionmentioning

confidence: 99%

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EPR and optical spectroscopy of Yb3+ ions in CaF2: an analysis of the structure of tetragonal centers

et al. 2004

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CaF 2 crystals doped with Yb 3+ ions have been studied by electron paramagnetic resonance (EPR) and optical spectroscopy. EPR spectra of paramagnetic centers (PCs) for eubic (Te) and tetragonal (T,ot) symmetries were identified. Empirical energy level diagrams were established and crystal field parameters were determined. Information on the CaF2:Yb 3 § phonon spectra was obtained from the electron-vibrational structure of the optical spectra. The crystal field parameters were used to analyze the crystal lattice distortions in the vicinity of the Yb 3 § ion. Within the framework of a superposition model, ir is established that four F-ions located symmetrically with respect to the fourfold axis from the side of the ion-compensator approach the impu¡ ion and deviate from the PC axis. The second set of four fluofine ions also approaches the Yb 3+ ion and the PC axis. The ion-compensator F-also approaches considerably the impu¡ ion.

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Section: Determining the Potentials Of Crystal Fieldssupporting

confidence: 70%

Section: Determining the Potentials Of Crystal Fieldsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

EPR and optical spectroscopy of Yb3+ ions in CaF2: an analysis of the structure of tetragonal centers

et al. 2004

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Analysis of the Intensity and Polarization Dependence of Two‐Photon Absorption in the Channel E_3/2(4f)−E_3/2(5d) for Ce³⁺ in CaF₂

Makhanek

Korol'kov

Yuguryan

1988

Physica Status Solidi (b)

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A calculation is made of the parity-forbidden two-photon absorption cross section of the transition between the lowest Stark sublevels for a tetragonal site Cc3+ (symmetry Ca,) in a cubic fluorite crystal as well a8 of polarizat.ion characteristics of a CaF, : Ce3+ monocrystal with different orientations ( k l ) LlOO], k 11 [llO], k 11 [ l l l ] , k is t.he wave vector of the incident laser beam). The calculated cross-sectional value (a, = 3.7 x m~-~ s) and the polarization dcpendences agree with experiment.

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Vacuum ultraviolet spectroscopy of Ce³⁺-doped SrMgF₄with superlattice structure

Yamaga

Hayashi

Kodama

et al. 2006

J. Phys.: Condens. Matter

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X-ray diffraction of Ce(3+)-doped SrMgF(4) (SMF:Ce) crystals shows a superlattice structure, reflecting the distribution of Ce(3+) polyhedra centres observed in optical experiments. Optical absorption bands and fluorescence bands from the Ce(3+) polyhedra centres overlap in the vacuum ultraviolet (VUV) and ultraviolet (UV) regions, respectively, so that wide pumping and tuning ranges are expected for laser operation. The SMF:Ce crystals, as well as the isomorphous BaMgF(4), are candidates for a tunable laser gain material with nonlinear properties. The optical absorption, excitation, and fluorescence bands observed in the SMF:Ce crystals at low temperatures are ascribed to five distinct fluorescent centres. Three centres have well-known Ce(3+) optical characters, for example, fluorescence with double peaks separated by 2000 cm(-1) and five resolved absorption/excitation bands. These centres are assigned to Ce(3+)-polyhedra classified by weak and strong crystal fields as a consequence of the superlattice structure. The other two fluorescence bands observed in the visible region have 1.5-2 times larger linewidths than those of the former three bands. These bands are interpreted as optical transitions from complexes consisting of Ce(3+) and one or two electrons trapped at a vacancy of the nearest neighbour F(-) ligand ions.

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Optical, Paramagnetic and Endor Spectra of Some Rare-Earth Ions in CaF2

Cited by 5 publications

References 16 publications

EPR and optical spectroscopy of Yb3+ ions in CaF2: an analysis of the structure of tetragonal centers

EPR and optical spectroscopy of Yb3+ ions in CaF2: an analysis of the structure of tetragonal centers

Analysis of the Intensity and Polarization Dependence of Two‐Photon Absorption in the Channel E_3/2(4f)−E_3/2(5d) for Ce³⁺ in CaF₂

Vacuum ultraviolet spectroscopy of Ce³⁺-doped SrMgF₄with superlattice structure

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Optical, Paramagnetic and Endor Spectra of Some Rare-Earth Ions in CaF2

Cited by 5 publications

References 16 publications

EPR and optical spectroscopy of Yb3+ ions in CaF2: an analysis of the structure of tetragonal centers

EPR and optical spectroscopy of Yb3+ ions in CaF2: an analysis of the structure of tetragonal centers

Analysis of the Intensity and Polarization Dependence of Two‐Photon Absorption in the Channel E3/2(4f)−E3/2(5d) for Ce3+ in CaF2

Vacuum ultraviolet spectroscopy of Ce3+-doped SrMgF4with superlattice structure

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Analysis of the Intensity and Polarization Dependence of Two‐Photon Absorption in the Channel E_3/2(4f)−E_3/2(5d) for Ce³⁺ in CaF₂

Vacuum ultraviolet spectroscopy of Ce³⁺-doped SrMgF₄with superlattice structure