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Two excellent phase-matchable infrared nonlinear-optical materials based on the 3D diamond-like frameworks: RbGaSn2Se6 and RbInSn2Se6

Abstract

Mid- and far-infrared (MFIR) nonlinear-optical (NLO) crystals with excellent performances are critical to the laser frequency-conversion technology. However, the current commercial MFIR NLO crystals, including AgGaS2 (AGS), AgGaSe2, and ZnGeP2 surfer their own intrinsic drawbacks and cannot achieve a good balance of large second-harmonic generation (SHG) efficiency and high laser induced damage thresholds (LIDTs). Herein, we report two new phase-matchable MFIR NLO chalcogenides, RbXSn2Se6 (X = Ga, In), which were successfully synthesized by high-temperature solid-state reactions. The remarkable structural feature is the 3D diamond-like framework (DLF) stacked by M3Se9 (M = X/Sn) asymmetric building units of vertex sharing MSe4 tetrahedra along the c axis. Significantly, both of them show the excellent NLO performances with a desired balance between the large SHG efficiencies (4.2 and 4.8 × benchmark AGS) and the large LIDTs (8.9 and 8.1 × benchmark AGS), demonstrating that title compounds meet the crucial conditions as promising MFIR NLO candidates. Furthermore, the crystal structures, synthesis, theoretical analysis, as well as optical properties are presented.

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Publication details

The article was received on 17 Apr 2017, accepted on 10 May 2017 and first published on 10 May 2017


Article type: Paper
DOI: 10.1039/C7DT01384A
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Two excellent phase-matchable infrared nonlinear-optical materials based on the 3D diamond-like frameworks: RbGaSn2Se6 and RbInSn2Se6

    H. Lin, H. Chen, Y. Zheng, J. Yu, X. Wu and L. Wu, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT01384A

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