期刊
CHEMICAL SCIENCE
卷 10, 期 47, 页码 10870-10875出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9sc04832d
关键词
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资金
- National Natural Science Foundation of China [21231006, 91622112, 21875248, 21773244]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]
- 100 Talents Project of Fujian Province
An excellent second harmonic generation (SHG) material, LiMg(IO3)(3) (LMIO), has been elaborately designed from Li2MIV(IO3)(6) (M-IV = Ti, Sn, and Ge) by aliovalent substitution of the central M-IV cation followed by Wyckoff position exchange. The new structure sustains the ideal-alignment of (IO3)(-) groups. Importantly, LMIO exhibits an extremely strong SHG effect of roughly 24 x KH2PO4 (KDP) under 1064 nm laser radiation or 1.5 x AgGaS2 (AGS) under 2.05 mu m laser radiation, which is larger than that of alpha-LiIO3 (18 x KDP). The replacement of M-IV with Mg2+ without d-d electronic transitions induces an obviously larger band gap (4.34 eV) with a short absorption edge (285 nm). This study shows that single-site aliovalent substitution provides a new synthetic route for designing SHG materials.
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