A new-type electro-optic crystal: K3Nb3B2O12

Lingfei Lv; Xiaoming Yang; Hongjiang Wu; Rongbing Su; Zujian Wang; Bin Su; Pai Shan; Bingxuan Li; Xifa Long; Ge Zhang; Feng Xu; Chao He

doi:10.1016/j.jmat.2024.100991

Journal of Materiomics (Sep 2025)

A new-type electro-optic crystal: K3Nb3B2O12

Lingfei Lv,
Xiaoming Yang,
Hongjiang Wu,
Rongbing Su,
Zujian Wang,
Bin Su,
Pai Shan,
Bingxuan Li,
Xifa Long,
Ge Zhang,
Feng Xu,
Chao He

Affiliations

Lingfei Lv: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China; University of Chinese Academy of Sciences, Beijing, 100049, China
Xiaoming Yang: State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, China
Hongjiang Wu: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China; University of Chinese Academy of Sciences, Beijing, 100049, China
Rongbing Su: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
Zujian Wang: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
Bin Su: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
Pai Shan: School of Electronic Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450011, China
Bingxuan Li: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China; Corresponding author.
Xifa Long: State Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, China
Ge Zhang: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
Feng Xu: School of Materials Science and Engineering, Fujian University of Technology, Fuzhou, 350118, China; Corresponding author.
Chao He: Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Corresponding author. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China.

DOI: https://doi.org/10.1016/j.jmat.2024.100991
Journal volume & issue: Vol. 11, no. 5
p. 100991

Abstract

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Electro-optical materials are crucial for lasers and modulators applications. Perovskite ferroelectric crystals, characterized by oxygen octahedrons and superior dipole migration capabilities, are recognized for their high electro-optic coefficients. However, the application of perovskite ferroelectric crystals is often limited by reduced optical transparency, which results from light scattering and reflection at domain walls. In this study, we implemented a structure dimensionality reduction strategy to successfully transform a three-dimensional structure KNbO3 (KNO) crystal into a quasi-two-dimensional layered structure K3Nb3B2O12 (KNBO) crystal through BO3 planar groups. This modification restricts the mobility of B-site ions within the layers while preserving significant spontaneous polarization along the interlayer direction, thus converting multipolar axis into a unipolar axis in the ferroelectric. This alteration in the direction of spontaneous polarization modifies the domain structure, thereby minimizing the scattering effects of the domain walls. As a result, the KNBO crystal exhibits a large effective electro-optic (EO) coefficient of 50.14 pm/V and a high transmittance exceeding 80% in the 330–2500 nm wavelength range. These properties surpass those of currently available commercial EO crystals. This research establishes a model for enhancing transparency and EO coefficient through structural design, offering potential applications to other EO crystals.

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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