A-site cation manipulation of exemplary second harmonic generation response and optical anisotropy in rare-earth borates

Ultraviolet nonlinear optical (UV NLO) materials have garnered significant interest for their prospective applications in advanced laser technologies. However, tailoring the desired structure in these materials remains a formidable challenge. Here, we propose a simple yet effective strategy for synt...

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Published inChemical science (Cambridge) Vol. 15; no. 39; pp. 16196 - 16204
Main Authors Song, Jie, Zhao, Huijian, Li, Conggang, Ye, Ning, Hu, Zhanggui, Wu, Yicheng
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 06.09.2024
The Royal Society of Chemistry
Subjects
Anisotropy
Borates
Cations
Chemistry
Nonlinear optics
Nonlinear response
Optical properties
Phase matching
Phase transitions
Potassium phosphates
Rare earth elements
Second harmonic generation
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Summary:Ultraviolet nonlinear optical (UV NLO) materials have garnered significant interest for their prospective applications in advanced laser technologies. However, tailoring the desired structure in these materials remains a formidable challenge. Here, we propose a simple yet effective strategy for synthesizing rare-earth borates, K Na La B O ( = 2-3), by manipulating the A-site cations to induce structural evolution. Notably, K Na La B O undergoes a phase transition from the 2 to the 2 space group by adjusting the K content to reach = 2.6. Moreover, the target compounds exhibit strong phase-matching second harmonic generation (SHG) efficiencies, ranging from 1.3 to 3.3 times that of KDP (KH PO ), and feature short UV cutoff edges of around 204-208 nm. Additionally, the correlation between microscopic polarizability, optical anisotropy, and the structural evolution of these materials was characterized through structural and theoretical analyses. These findings highlight the potential applications of K Na La B O as UV NLO materials and underscore the viability of manipulating A-site cations to fabricate NLO crystals with desirable properties.
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Song J. and Zhao H. contributed equally to this work.
ISSN:2041-6520
2041-6539
DOI:10.1039/d4sc05081a