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Volume 15
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10.3390/sym15010236
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Article

K2CdGe3S8: A New Infrared Nonlinear Optical Sulfide

by
Zi-Xuan Wu
1,2,
Wen-Fa Chen
1,2,
Bin-Wen Liu
1,
Xiao-Ming Jiang
1,* and
Guo-Cong Guo
1,*
1
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
2
University of Chinese Academy of Sciences, Beijing 100190, China
*
Authors to whom correspondence should be addressed.
Symmetry 2023, 15(1), 236; https://doi.org/10.3390/sym15010236
Submission received: 10 November 2022 / Revised: 29 December 2022 / Accepted: 4 January 2023 / Published: 15 January 2023
(This article belongs to the Special Issue Advances in Nonlinear Optics and Symmetry)
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Abstract

A quaternary metal chalcogenide, namely K2CdGe3S8 (I), is obtained through a high-temperature solid-state approach. Compound I crystallizes with the non-centrosymmetric space group P212121. It features a 2D layer structure with [CdGe3S8] layers consisting of tetrahedral GeS4 and CdS4 units, and counter K+ embedded between the layers. The compound exhibits a powder second-harmonic generation (SHG) response of ~0.1 times that of KH2PO4 (KDP) with phase-matchable character at the laser wavelength of 1064 nm. Remarkably, it has a wide band gap (3.20 eV), which corresponds to a favorable high laser-induced damage threshold of 6.7 times that of AgGaS2. In addition, the calculated birefringence (Δn) is 0.039 at the wavelength of 1064 nm, which satisfies the Δn criteria for a promising infrared NLO material.
Keywords: nonlinear optical material; metal chalcogenide; second-harmonic generation; crystal structure; density functional theory nonlinear optical material; metal chalcogenide; second-harmonic generation; crystal structure; density functional theory

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MDPI and ACS Style

Wu, Z.-X.; Chen, W.-F.; Liu, B.-W.; Jiang, X.-M.; Guo, G.-C. K2CdGe3S8: A New Infrared Nonlinear Optical Sulfide. Symmetry 2023, 15, 236. https://doi.org/10.3390/sym15010236

AMA Style

Wu Z-X, Chen W-F, Liu B-W, Jiang X-M, Guo G-C. K2CdGe3S8: A New Infrared Nonlinear Optical Sulfide. Symmetry. 2023; 15(1):236. https://doi.org/10.3390/sym15010236

Chicago/Turabian Style

Wu, Zi-Xuan, Wen-Fa Chen, Bin-Wen Liu, Xiao-Ming Jiang, and Guo-Cong Guo. 2023. "K2CdGe3S8: A New Infrared Nonlinear Optical Sulfide" Symmetry 15, no. 1: 236. https://doi.org/10.3390/sym15010236

APA Style

Wu, Z.-X., Chen, W.-F., Liu, B.-W., Jiang, X.-M., & Guo, G.-C. (2023). K2CdGe3S8: A New Infrared Nonlinear Optical Sulfide. Symmetry, 15(1), 236. https://doi.org/10.3390/sym15010236

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