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_(...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.展开更多
基金the National Natural Science Foundation of China(No.61775217)。
文摘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.