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Crystal Research and Technology |
Cryst. Res. Technol. 39,
105 (2004) - Abstract -
Studies on the growth and optical characterization of dysprosium gadolinium oxalate single crystals
A. Elizebeth, V. Thomas*, G. Jose, G. Jose, N. V. Unnikrishnan, C. Joseph, and M. A. Ittyachen**
School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam-686 560, India
*Department of Physics, Christian College, Chengannur
**Department of Instrumentation, Cochin University of Science and Technology, Cochin –22, India
| Keywords | crystal growth, dysprosium gadolinium oxalate, Judd-Ofelt theory |
| PACS | 61.10 Nz, 42.70Hj |
| DOI | 10.1002/crat.200310156 |
Preparation and optical characterization of dysprosium gadolinium oxalate (DGO) single crystal is reported. The crystals were grown using silica gel technique, by the controlled reaction of rare earth nitrates with oxalic acid. Crystals were characterized using X-ray powder diffraction, optical absorption and fluorescence studies. Radiative transition probability, fluorescence branching ratio and radiative lifetime of Dy3+ in the crystal are evaluated by the parameterization of the absorption spectrum by the Judd-Ofelt theory. The recorded fluorescence spectrum showed two well resolved peaks at 480 nm and 571 nm and are assigned to the transitions from 4F9/2->6H15/2 and 6H13/2 of Dy3+. Stimulated emission crossection and optical gain of these transitions are also evaluated.
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