Broadband infrared luminescence of Ni-doped silicate glass-ceramics containing lithium aluminate spinel nanocrystals |
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| Authors: | Degang Deng Shiqing Xu Qian Wang Shilong Zhao Chenxia Li |
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| Affiliation: | a College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, Chinab School of Mechanical and Automotive Engineering, Zhejiang University of Science and Technology, Hangzhou 310012, Chinac College of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China |
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| Abstract: | Transparent Ni2+-doped SiO2-Al2O3-Ga2O3-Li2O (LGAS) glass-ceramics embedding lithium aluminate spinel nanocrystals was prepared. After heat treatment, LiAl5O8 crystallite was precipitated in the glasses, and its size was about 3 nm. It was confirmed from the absorption spectra that the ligand environment of Ni2+ ions changed from the trigonal bi-pyramid fivefold sites in the as-made glass to the octahedral sites in the glass-ceramics. Upon excitation at 980 nm, broadband infrared luminescence centered at around 1250 nm with full width at half maximum (FWHM) more than 250 nm was observed originating from the 3T2(3F) → 3A2(3F) transition of Ni2+ in octahedral sites. The broadband near-infrared (NIR) emission from Ni2+-doped glass-ceramics can be as host materials for broadband optical amplifier. |
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| Keywords: | Ni2+ ions Glass-ceramics Broadband infrared luminescence |
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