LiMg(IO 3 ) 3 : an excellent SHG material designed by single-site aliovalent substitution

An excellent second harmonic generation (SHG) material, LiMg(IO ) (LMIO), has been elaborately designed from Li M (IO ) (M = Ti, Sn, and Ge) by aliovalent substitution of the central M cation followed by Wyckoff position exchange. The new structure sustains the ideal-alignment of (IO ) groups. Impor...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2019-12, Vol.10 (47), p.10870-10875
Main Authors: Chen, Jin, Hu, Chun-Li, Mao, Fei-Fei, Zhang, Xiao-Han, Yang, Bing-Ping, Mao, Jiang-Gao
Format: Article
Language:English
Subjects:
Crystallography
Germanium
Potassium phosphates
Rapid prototyping
Second harmonic generation
Silver gallium sulfide
Substitutes
Tin
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Summary:An excellent second harmonic generation (SHG) material, LiMg(IO ) (LMIO), has been elaborately designed from Li M (IO ) (M = Ti, Sn, and Ge) by aliovalent substitution of the central M cation followed by Wyckoff position exchange. The new structure sustains the ideal-alignment of (IO ) groups. Importantly, LMIO exhibits an extremely strong SHG effect of roughly 24 × KH PO (KDP) under 1064 nm laser radiation or 1.5 × AgGaS (AGS) under 2.05 μm laser radiation, which is larger than that of α-LiIO (18 × KDP). The replacement of M with Mg 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.
ISSN:2041-6520
2041-6539
DOI:10.1039/c9sc04832d