LiCdGeSeand LiCdSnSe: Strong Nonlinear Optical Response in Quaternary Diamond-Like Selenide Networks.

Author(s) Guo, Y.; Li, X.; Feng, K.; Li, C.; Zhou, M.; Wu, Y.; Yao, J.
Journal Chem Asian J
Date Published 2018 Feb 02

Two new selenides with diamond-like structures, LiCdGeSeand LiCdSnSe, were synthesized by using a conventional high-temperature solid-state reaction method. They crystallize in the space group Pna2(no. 33) of the orthorhombic system. Their three-dimensional frameworks consist of corner-sharing LiSe, CdSe, and MSe(M=Ge, Sn) tetrahedra. These two compounds exhibit strong powder second-harmonic generation responses that are about 1.2 and 2.5 times that of the benchmark AgGaSat a laser wavelength of λ=2.09 μm, and also demonstrate type I phase-matchable behavior. The optical bandgaps were determined to be 2.18 and 1.95 eV for LiCdGeSeand LiCdSnSe, respectively. Furthermore, these two materials exhibit congruent melting behavior at rather low temperatures of 985 and 1060 K, respectively, which makes bulk single crystal growth by using the Bridgman-Stockbarger method possible. Our study indicates that these two materials show advantages over the traditional IR NLO material CdSe and are promising for practical applications.

DOI 10.1002/asia.201800090
ISSN 1861-471X
Citation Chem Asian J. 2018.

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