Volume 137, Issue 11 e202421825
Forschungsartikel

Design of High-Performance Infrared Nonlinear Optical PAs3S3 with Perfectly Aligned Polar Molecular Cage via a Bipolar-Axis-Symmetry Coupling Strategy

Chao Wang

Chao Wang

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

University of the Chinese Academy of Sciences, Beijing, 100049 China

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Prof. Chensheng Lin

Prof. Chensheng Lin

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

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Dr. Xin Zhao

Dr. Xin Zhao

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

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Dr. Shunda Yang

Dr. Shunda Yang

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

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Prof. Tao Yan

Prof. Tao Yan

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

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Prof. Shenghao Fang

Prof. Shenghao Fang

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

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Lingli Wu

Lingli Wu

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

University of the Chinese Academy of Sciences, Beijing, 100049 China

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Prof. Ning Ye

Prof. Ning Ye

Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin, 300384 China

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Prof. Min Luo

Corresponding Author

Prof. Min Luo

Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China

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First published: 05 December 2024
Citations: 2

Abstract

Strong polar molecular cages have recently emerged as novel functional building units for high-performance infrared nonlinear optical (IR NLO) crystals. However, these highly polar molecular cages often arrange themselves in a way that cancels out their polarity, leading to a more energetically stable state. As a result, most cage crystal formations tend to crystallize in centrosymmetric space groups, which conflicts with the primary requirement for NLO crystals. Herein, we address the challenge of polar molecular cage arrangement through bipolar-axis-symmetry coupling strategy, utilizing classical NLO parent compounds. By substituting the C3v symmetric [B3O6] groups with polar C3v symmetric [PAs3S3] cages within the β-BBO polar aixs lattice, we successfully synthesized a new compound, PAs3S3 (PAS), which exhibits a consistent arrangement of polar molecular cages — crucial for maximizing NLO performance. Additionally, due to the non-covalent interactions among [PAs3S3] polar molecular cages, PAS demonstrates an unexpectedly strong second harmonic generation (SHG) about 8 times that of AgGaS2, along with a significant band gap of 2.75 eV. Furthermore, PAS exhibits remarkable stability against air and moisture. These findings validate our design strategy and position PAS as a promising candidate for applications in IR NLO crystals.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.