摘要
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_(2)Al_(2)SiO_(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_(2)Al_(2)SiO_(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.
作者
WANG Dong-Mei
LIU Guo-Jiao
LIU Le-Hui
YUAN Fei-Fei
ZHANG Li-Zhen
LIN Zhou-Bin
王东梅;刘国娇;刘乐辉;苑菲菲;张莉珍;林州斌(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;Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China;State Key Laboratory of Structural Chemistry,Fuzhou 350002,China)
基金
the National Natural Science Foundation of China(No.61775217)。
