title: Size-induced crystal field parameter change and tunable infrared luminescence in Ni(2+)-doped high-gallium nanocrystals embedded glass ceramics.
abstract: Transparent Ni(2+)-doped Li(2)O-Ga(2)O(3)-SiO(2) glass ceramics (GCs) were prepared and characterized. By controlling the size of the nanocrystals, the infrared luminescence is tunable. It could be ascribed to alteration of the crystal field strength Dq of octahedral Ni(2+), which is due to the changes of the lattice parameters. The change in optical signals at telecommunication bands when the seed beam passes through the bulk sample with or without 980 nm excitation was also demonstrated for the first time. The coefficient of the change in optical signals at 1.3 µm is calculated as 0.26 cm(-1). The changes in optical signal have shown similar wavelength dependence on the luminescence property.
authors: State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People's Republic of China. Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China.
authors: Shifeng
authors: S
authors: Zhou
authors: Nan
authors: N
authors: Jiang
authors: Huafang
authors: H
authors: Dong
authors: Heping
authors: H
authors: Zeng
authors: Jianhua
authors: J
authors: Hao
authors: Jianrong
authors: J
authors: Qiu