학술논문
Growth and investigation of cobalt doped β-Ga2 O3 grown by optical floating zone technique.
Document Type
Article
Source
Subject
*X-ray powder diffraction
*LATTICE constants
*ABSORPTION spectra
*COBALT
*SINGLE crystals
*BAND gaps
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Language
ISSN
0094-243X
Abstract
Single crystals of undoped and Co-doped β-Ga2O3 with different doping concentration have been grown using optical floating zone technique. The powder X-ray diffraction analysis shows no significant variation in lattice parameters on Co doping in the crystal. The absorption spectra shows a decrease in the absorption edge with Co-doping and a broad absorption band in the range 950-1700 nmdue to transitions in Co ions. The absorption analysis shows that both undoped and Co-doped β-Ga2O3 crystal possess indirect bandgap with band gap energy decreasing on increasing the Co-doping. Further, the Urbach energy has also been estimated which is found to increase with the increase in Co-doping. The observed absorption band can be utilized as a saturable to achieve passive Q-switching of near IR lasers. [ABSTRACT FROM AUTHOR]