Journal ArticleDOI
Preparation and properties of GeGaS glasses for laser hosts
TLDR
In this paper, the preparation and purification of GeGa-S glasses were studied and the effects of Ga and S contents on glass transition and crystallization temperatures, density, refractive index and spontaneous emission probabilities from the 4 F 3 2 level of Nd 3+ were examined.Abstract:
The preparation and purification of GeGaS glasses were studied. A purified glass doped with 1000 ppm Pr 3+ exhibits a quantum efficiency of 50% in the 1 G 4 → 3 H 5 transition at 1.3 μm based on fluorescence lifetime measurement and Judd-Ofelt analysis. The effects of Ga and S contents on glass transition and crystallization temperatures, density, refractive index and spontaneous emission probabilities from the 4 F 3 2 level of Nd 3+ were examined. Compositional dependences of properties are discussed in terms of bond types.read more
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Recent progress in quantum cutting phosphors
Qi Zhang,Xiaoyong Huang +1 more
TL;DR: In this paper, the authors reviewed the recent progress made in the fields of UV-visible quantum cutting (QC) and the mechanism involved, including QC in single RE ion activated fluorides- and oxides-based phosphors, energy transfer and downconversion, QC in dual/ternary ions activated phosphors; and NIR QC in RE3+-Yb3+ (RE=Tb, Tm, and Pr) dual ions doped phosphors via cooperative energy transfer.
Journal ArticleDOI
Optical band gap and optical constants in amorphous Se96−xTe4Agx thin films
TL;DR: In this article, the optical constants (absorption coefficient (α), refractive index (n), extinction coefficient (k), real and imaginary part of dielectric constant) have been studied for a-Se96−xTe4Agx (where x = 0, 4, 8, 12) thin films as a function of photon energy in the wavelength range.
Journal ArticleDOI
Structural and optical properties of SeGe and SeGeX (X = In, Sb and Bi) amorphous films
TL;DR: In this article, the dispersion of the refractive index is discussed in terms of Wemple-Didomenico single oscillator model and the optical dispersion parameters Eo and Ed were determined according to the above-mentioned model.
Journal ArticleDOI
Evaluation of basic physical parameters of quaternary Ge–Sb-(S,Te) chalcogenide glasses
V. Pamukchieva,A. Szekeres,K. Todorova,Margit Fábián,Erzsébet Sváb,Zs. Révay,László Szentmiklósi +6 more
TL;DR: In this article, a quaternary chalcogenide GexSb40� xS50Te10 (x = 10, 20 and 27 at.%) and Gex Sb40'' xS55Te5 (x= 20, 27, 27 and 28 at.%).
Journal ArticleDOI
Compositional variation in the structure of Ge-S glasses
TL;DR: X-ray photoelectron spectroscopy (XPS), and X-ray fluorescence (XRF) and Raman spectroscopies have been used to characterize the structure of Ge-S binary glasses in the compositional range 57-90 at.% S, together with evaluating the valences of Ge and S as mentioned in this paper.
References
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Journal ArticleDOI
Optical absorption intensities of rare-earth ions
TL;DR: In this paper, an expression for the oscillator strength of a transition between two states of the ground configuration $4{f}^{N}, on the assumption that the levels of each excited configuration of the type $4 {f} n{n}^{\ensuremath{'n}d$ or $4
Journal ArticleDOI
Intensities of Crystal Spectra of Rare‐Earth Ions
TL;DR: In this article, the transition probability of pure-electronic electric dipole transitions between levels of the 4-fluorescence configuration perturbed by a static crystalline field is treated.
Journal ArticleDOI
Judd-Ofelt parameters and chemical bonding☆
TL;DR: In this paper, the three Judd-Ofelt intensity parameters for erbium(III) are given in 17 different environments, and the effect of covalent chemical bonding on the intensity is discussed.
Journal ArticleDOI
Compositional dependence of Judd-Ofelt parameters of Er3+ ions in alkali-metal borate glasses.
TL;DR: The Judd-Ofelt intensity parameters, Ω, (t=2,4,6) for f-f transitions of Er 3+ ions doped in B 2 O 3 -R 2 O glasses were determined from optical-absorption measurements, and their compositional dependence was investigated systematically.
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