Cooperative luminescence in ytterbium-doped CsCdBr3
Identifieur interne : 002976 ( Main/Exploration ); précédent : 002975; suivant : 002977Cooperative luminescence in ytterbium-doped CsCdBr3
Auteurs : Ph. Goldner [France] ; F. Pellé [France] ; D. Meichenin [France] ; F. Auzel [France]Source :
- Journal of Luminescence [ 0022-2313 ] ; 1997.
English descriptors
- KwdEn :
- Absorption coefficient, Absorption spectrum, Apte effect, Asymmetric, Asymmetric pairs, Asymmetric pairs concentration, Cooperative effect, Cooperative effects, Cooperative emission, Cooperative emission rate, Cooperative luminescence, Cooperative luminescence rate, Cooperative rate, Cooperative rate constants, Cooperative spectrum, Cooperative transitions, Cscdbr, Cubic symmetry, Divalent state, Electronic coulomb interaction, Electronic interaction, Electronic lines, Emission lines, Equal population, Excitation, Excitation spectrum, Excitation spectrum monitoring, Experimental data, Experimental results, Experimental value, Extra line, Extra lines, Goldner, Good agreement, Ground state, Infrared emission, Infrared emission spectrum, Infrared emissions, Infrared excitation, Ion, Irreducible representation, Laser beam, Line strength, Lowest component, Luminescence, Luminescence intensity, Matrix, Matrix element, Minor centers, Multiplet, Nominal concentration, Other hand, Overall splitting, Phys, Previous studies, Previous works, Radial integrals, Rate equations, Refractive index, Solid angle, Stark components, Stark levels, Symmetric pairs, Temperature results, Tentative estimation, Theoretical calculations, Ytterbium, Ytterbium ions.
- Teeft :
- Absorption coefficient, Absorption spectrum, Apte effect, Asymmetric, Asymmetric pairs, Asymmetric pairs concentration, Cooperative effect, Cooperative effects, Cooperative emission, Cooperative emission rate, Cooperative luminescence, Cooperative luminescence rate, Cooperative rate, Cooperative rate constants, Cooperative spectrum, Cooperative transitions, Cscdbr, Cubic symmetry, Divalent state, Electronic coulomb interaction, Electronic interaction, Electronic lines, Emission lines, Equal population, Excitation, Excitation spectrum, Excitation spectrum monitoring, Experimental data, Experimental results, Experimental value, Extra line, Extra lines, Goldner, Good agreement, Ground state, Infrared emission, Infrared emission spectrum, Infrared emissions, Infrared excitation, Ion, Irreducible representation, Laser beam, Line strength, Lowest component, Luminescence, Luminescence intensity, Matrix, Matrix element, Minor centers, Multiplet, Nominal concentration, Other hand, Overall splitting, Phys, Previous studies, Previous works, Radial integrals, Rate equations, Refractive index, Solid angle, Stark components, Stark levels, Symmetric pairs, Temperature results, Tentative estimation, Theoretical calculations, Ytterbium, Ytterbium ions.
Abstract
Abstract: Under near infrared excitation, ytterbium-doped CsCdBr3 exhibits a strong blue luminescence due to a cooperative effect. The energy level scheme of Yb3+ ions has been determined at low temperature by spectroscopic measurements, allowing us to calculate the theoretical spectrum of the cooperative luminescence. The good agreement obtained with the experimental data confirms the process governing the anti-Stokes emission. We also present a comparison between theoretical and experimental cooperative luminescence rates which is of particular interest because trivalent ions enter this lattice to form pairs of fixed structure. Theoretical calculations of the cooperative luminescence probability are therefore much easier than in other compounds. The experimental cooperative rate constant is 0.13 s−1, whereas the dipole-quadrupole and forced dipole-dipole interactions result in a theoretical rate constant of approximately 0.70−1.6 × 10−2s−1 for symmetric pairs and 0.76−1.7 × 10−1s−1 for asymmetric ones. From a tentative estimation of asymmetric pairs concentration, we find a total cooperative rate constant between 2.2 × 10−2 and 5.0 × 10−2s−1. The agreement with experiment is considered to be reasonable since the radial integrals inserted in the theoretical calculations are not adjusted to experiment.
Url:
DOI: 10.1016/S0022-2313(96)00128-7
Affiliations:
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ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Under near infrared excitation, ytterbium-doped CsCdBr3 exhibits a strong blue luminescence due to a cooperative effect. The energy level scheme of Yb3+ ions has been determined at low temperature by spectroscopic measurements, allowing us to calculate the theoretical spectrum of the cooperative luminescence. The good agreement obtained with the experimental data confirms the process governing the anti-Stokes emission. We also present a comparison between theoretical and experimental cooperative luminescence rates which is of particular interest because trivalent ions enter this lattice to form pairs of fixed structure. Theoretical calculations of the cooperative luminescence probability are therefore much easier than in other compounds. The experimental cooperative rate constant is 0.13 s−1, whereas the dipole-quadrupole and forced dipole-dipole interactions result in a theoretical rate constant of approximately 0.70−1.6 × 10−2s−1 for symmetric pairs and 0.76−1.7 × 10−1s−1 for asymmetric ones. From a tentative estimation of asymmetric pairs concentration, we find a total cooperative rate constant between 2.2 × 10−2 and 5.0 × 10−2s−1. The agreement with experiment is considered to be reasonable since the radial integrals inserted in the theoretical calculations are not adjusted to experiment.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Île-de-France</li></region><settlement><li>Bagneux</li><li>Meudon</li></settlement></list><tree><country name="France"><region name="Île-de-France"><name sortKey="Goldner, Ph" sort="Goldner, Ph" uniqKey="Goldner P" first="Ph." last="Goldner">Ph. Goldner</name></region><name sortKey="Auzel, F" sort="Auzel, F" uniqKey="Auzel F" first="F." last="Auzel">F. Auzel</name><name sortKey="Auzel, F" sort="Auzel, F" uniqKey="Auzel F" first="F." last="Auzel">F. Auzel</name><name sortKey="Meichenin, D" sort="Meichenin, D" uniqKey="Meichenin D" first="D." last="Meichenin">D. Meichenin</name><name sortKey="Pelle, F" sort="Pelle, F" uniqKey="Pelle F" first="F." last="Pellé">F. Pellé</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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