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Ti-doped MgAl2O4 spinel single crystals grown by the micro-pulling-down method for laser application: Growth and strong visible blue emission

Published online by Cambridge University Press:  03 March 2011

Anis Jouini ,
Hiroki Sato ,
Akira Yoshikawa ,
Tsuguo Fukuda ,
Georges Boulon ,
Gérard Panczer ,
Kiyoshi Kato  and
Eiichi Hanamura
Anis Jouini*
Affiliation:
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
Hiroki Sato
Affiliation:
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
Akira Yoshikawa
Affiliation:
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
Tsuguo Fukuda
Affiliation:
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
Georges Boulon
Affiliation:
Physical Chemistry of Luminescent Materials, UMR CNRS 5620, Claude Bernard / Lyon 1 University, Villeurbanne 69622, France
Gérard Panczer
Affiliation:
Physical Chemistry of Luminescent Materials, UMR CNRS 5620, Claude Bernard / Lyon 1 University, Villeurbanne 69622, France
Kiyoshi Kato
Affiliation:
Chitose Institute of Science and Technology, 758-65, Bibi Chitose-city, Hokkaido 066-8655, Japan
Eiichi Hanamura
Affiliation:
Chitose Institute of Science and Technology, 758-65, Bibi Chitose-city, Hokkaido 066-8655, Japan
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The photoluminescence spectra of the rod-shaped pure and Ti-doped MgAl2O4 single crystals, grown by the micro-pulling-down (μ-PD) method, have been systematically investigated under high-intensity pulsed Nd3+: YAG laser excitation in the ultraviolet (UV) region (266 nm). The chemical properties of the grown crystals under reducing argon atmosphere will be reported and the annealing effect under oxidizing atmosphere will be discussed. The room temperature luminescence properties of Ti-doped MgAl2O4 single crystals were performed before and after annealing as a function of the titanium concentration. Three broad bands absorption in the UV/VIS (visible) spectral regions and a broadband visible blue emission were observed from Ti-doped MgAl2O4. An estimation of the decay time value of theses emissions was determined from the time-resolved spectra and the energies of the vibrational modes of the MgAl2O4 crystal are obtained from the infrared spectra.

Keywords

Crystal growthLaserTi
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 9 , September 2006 , pp. 2337 - 2344
Copyright
Copyright © Materials Research Society 2006

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References

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