Crystal Growth,Structure, and Spectral Properties of Cr~(4+):Ca_2(Al_(1.8)Ga_(0.2))SiO_7 |
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| Institution: | College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China;Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China;Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;State Key Laboratory of Structural Chemistry,Fuzhou 350002,China |
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| Abstract: | A new crystal, Ca_2(Al_(1.8)Ga_(0.2))SiO_7, was obtained by substituting Ga~(3+) ions for some Al~(3+) ions in Ca_2Al_2SiO_7 crystal. The growth, structure and optical spectroscopic properties of Cr~(4+)-doped Ca_2(Al_(1.8)Ga_(0.2))SiO_7 were studied. It shows strong absorption at 693 and 762 nm and a broad emission band with peak wavelength at 1223 nm. Both the absorption and emission peaks of Cr_(4+)-doped Ca_2(Al_(1.8)Ga_(0.2))SiO_7 crystal are red-shifted in comparison with that of Cr~(4+)-doped Ca_2Al_2SiO_7 crystal due to its weaker lattice field. The investigation results show that there is only one kind of tetrahedral site for Cr~(4+) occupation in the lattice of Ca_2(Al_(1.8)Ga_(0.2))SiO_7 crystal. |
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