Cr3+ ions in hydrogenated and proton exchanged lithium niobate crystals

被引：1
作者：
Kaminska, A
Arizmendi, L
Barcz, A
Lusakowska, E
Suchocki, A
机构：
[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
[2] Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain
来源：
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2004年 / 201卷 / 02期
关键词：
D O I：
10.1002/pssa.200303916
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We studied influence of annealing in water vapour and proton exchange on high-pressure low-temperature luminescence spectra of near stoichiometric LN: Cr, MgO crystals, containing both Cr-Li and Cr-Nb centers by using diamond-anvil cell technique. The observed changes of the spectra of Cr3+ ions are associated with the larger inhomogeneous broadening and increase of the splitting of the 2 E level of the so called 6 CrNb center. This shows that neither increase of hydrogen concentration in LN by almost two orders of magnitude (from 10(18) to almost 10(20) cm(-3)) nor proton-exchange procedure do not create any new optically active Cr3+ centers in those crystals. This does not support the hypothesis about the close compensation of Cr-Nb(3+) sites in LiNbO3 crystals by hydrogen
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页码：298 / 303
页数：6
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