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Updated: Dec 23, 2025

Author Spotlight: Advances in Nanoscale Infrared Spectroscopy to Explore Multiphase Polymeric Systems
Published on: June 23, 2023
KInSi1.32Sn0.68Se6: An Infrared Nonlinear Optical Material Containing Three Types of Tetrahedral Units
Xiao-Hui Li1, Yi-Ting Chen1, Huaiguo Xue1
1School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, P. R. China.
Abstract:
The deficiency of nonlinear optical (NLO) materials in the infrared region pushes continuous exploration of new ones with desired performances. In this work, a novel pentanary selenide KInSi1.32Sn0.68Se6 is discovered by using a high-temperature solid-state reaction. It crystallizes in the monoclinic noncentrosymmetric space group Cc featuring a 3D [(InSi1.32Sn0.68Se6)-] polyanionic network, and its powder sample presents promising NLO behaviors, namely 1.3-times second-harmonic generation response and close laser-induced damage threshold than those of benchmark AgGaS2. Besides, it is phase-matchable and shows a wide transparent region. Theoretical calculation addressing its electronic structure and optical property is also performed.
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