Reverse Weak Polarity-Induced Ordered Layer Control for Enhanced Second-Harmonic Generation in Ultraviolet Nonlinear Optical Crystals.

Lingli Wu, Chensheng Lin, Bing-Xuan Li, Huixin Fan, Lingfei Lv, Shunda Yang, Tao Yan, Min Luo

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Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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8 authors.

Lingli WuState Key Laboratory of Functional Crystals and Devices, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China.

Chensheng LinState Key Laboratory of Functional Crystals and Devices, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China.ORCID https://orcid.org/0000-0003-1895-4980

Bing-Xuan LiState Key Laboratory of Functional Crystals and Devices, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China.

Huixin FanState Key Laboratory of Functional Crystals and Devices, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China.

Lingfei LvState Key Laboratory of Functional Crystals and Devices, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China.

Shunda YangState Key Laboratory of Functional Crystals and Devices, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China.

Tao YanState Key Laboratory of Functional Crystals and Devices, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China.ORCID https://orcid.org/0000-0003-4246-0964

Min LuoState Key Laboratory of Functional Crystals and Devices, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, China.ORCID https://orcid.org/0000-0001-9062-8931

Funding

Fuzhou Science and Technology Program 2025-P-001National Natural Science Foundation of China 22471271National Natural Science Foundation of China 22505261National Natural Science Foundation of China 52302008Natural Science Foundation of Fujian Province 2023J02026Natural Science Foundation of Fujian Province 2024J08102Natural Science Foundation of Fujian Province 2025J01244Self-deployed Project of State Key Laboratory of Functional Crystals and Devices GNJT-2025-QN03Self-deployed Project of State Key Laboratory of Functional Crystals and Devices ZRQN2501F

6 · The paper itself

Abstract

There is an urgent need to achieve a large second-harmonic generation (SHG) response in ultraviolet nonlinear optical (UV NLO) crystals to advance UV laser technologies. SHG efficiency depends on the alignment and properties of functional groups, particularly π-conjugated units with high hyperpolarizability. Layered structures are widely recognized as an optimal template for densely preorganizing π-conjugated units into orderly arrays, yet the interlayer linkers are typically metal cations that couple adjacent layers through largely non-directional ionic interactions, often producing random even antiparallel stacking that cancels macroscopic SHG. Herein, we propose a Reverse Weak Polarity-Induced Ordered-layer Control (RPIO) strategy, in which a "layer→linker→layer" polarity-transfer pathway-driven by dipole-dipole interactions-enforces consistent alignment of polar layers. Guided by this strategy, three isostructural compounds, RE(C

Indexed as

layered structurespolarity transfersecond harmonic generationultraviolet nonlinear optical crystal

Identifiers

PMID42114155

DOI10.1002/advs.75642

PMCPMC13335983

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