Journal ArticleDOI
L'auto-extinction de Nd3+ : Son mecanisme fondamental et un critere predictif simple pour les materiaux minilaser
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TLDR
In this article, the crystal field plays an important role in the self quenching process of neodymium 4F3/2 level and a limit to the easily available ground state splitting is given.About:
This article is published in Materials Research Bulletin.The article was published on 1979-02-01. It has received 118 citations till now.read more
Citations
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Journal ArticleDOI
Upconversion and Anti-Stokes Processes with f and d Ions in Solids
TL;DR: Before the 1960s, all anti-Stokes emissions, which were known to exist, involved emission energies in excess of excitation energies by only a few kT and were linked to thermal population of energy states above excitation states by such an energy amount.
Book ChapterDOI
Chapter 155 Rationalization of crystal-field parametrization
TL;DR: In this article, the symmetry aspects of the crystal field and the parametrization of the energy level scheme are discussed and the determination of phenomenological crystal-field parameters is described.
Journal ArticleDOI
Spectroscopic properties of a new light-converting device Eu(thenoyltrifluoroacetonate)3 2(dibenzyl sulfoxide). A theoretical analysis based on structural data obtained from a sparkle model
Oscar L. Malta,Hermi F. Brito,J.F.S. Menezes,F.R. Gonçalves e Silva,S. Alves,F.S. Farias,A.V.M. de Andrade +6 more
TL;DR: In this paper, the synthesis, characterization and spectroscopic properties of the compound Eu(thenoyltrifluoroacetonate), 2(dibenzyl sulfoxide) which is highly luminescent under UV excitation are described.
Journal ArticleDOI
Generation of spatially incoherent short pulses in laser-pumped neodymium stoichiometric crystals and powders
TL;DR: In this paper, the authors developed mirrorless quasi-monochromatic laser sources made of stoichiometric neodymium compounds (Nd0.75:La0.25P4O15 and NdCl3· 6H2O) pumped by nanosecond laser pulses and found that short sub-nanosecond and narrowbandwidth (0.15-nm) pulses are generated in both compounds when they are pumped at high intensities.
Journal ArticleDOI
A scalar crystal field strength parameter for rare-earth ions : meaning and usefulness
F. Auzel,O.L. Malta +1 more
TL;DR: In this paper, the meaning of a scalar crystal field strength parameter defined previously [4, 5] is studied and it is shown why, in many cases, it can be used as an indication of the magnitude of the maximum Stark splitting of J-terms for ions in crystals of different structures and site symmetries.
References
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Journal ArticleDOI
A Theory of Sensitized Luminescence in Solids
TL;DR: In this article, the resonance theory of Forster, which involves only allowed transitions, is extended to include transfer by means of forbidden transitions which, it is concluded, are responsible for the transfer in all inorganic systems yet investigated.
Journal ArticleDOI
Theory of lanthanide crystal fields
TL;DR: In this article, it was shown that overlap and covalency make the dominant contributions to the observed field, the electrostatic contributions only being inportant for the potential components with low angular dependence (i.e., the n=2 parameters).
Journal ArticleDOI
Fluorescence in neodymium ultraphosphate
H. G. Danielmeyer,H. P. Weber +1 more
TL;DR: In this article, the properties of the Nd-ultraphosphate NdP 5 O 14 (NdUP), a crystalline material that appears to be a promising candidate for an efficient Nd laser, are described.