A remarkable solar-blind ultraviolet nonlinear optical crystal with comprehensive performance and enhanced thermal stability†

IF 6.4 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Materials Chemistry Frontiers Pub Date : 2025-01-22 DOI:10.1039/D4QM01036A

Jialin Zeng, Shuangcheng Li, Ruibiao Fu, Zilong Geng, Yiting Luo, Senfu Lei and Zuju Ma

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Abstract

Solar-blind ultraviolet (UV) nonlinear optical (NLO) crystals are urgently demanded for their important applications in modern lasers. Herein, a remarkable solar-blind UV NLO crystal, K[H₂N(CH₂COO)₂], was rationally obtained by tuning alkali metal cations. Interestingly, it was noted that the [H₂N(CH₂COO)₂] groups were held between the helical chains in an ordered arrangement that superimposed their microscopic second-order susceptibilities. Notably, K[H₂N(CH₂COO)₂] exhibited comprehensive NLO performance, including a strong phase-matching SHG response of 1.6 × KDP at 1064 nm and 0.6 × BBO at 532 nm, a suitable birefringence of 0.124 at 1064 nm, a high LDT up to 332 MW cm⁻², a distinct UV cutoff edge of 216 nm, a wide high-transparency window covering 246–1554 nm, the shortest phase-matching wavelength extending to 250 nm and easy growth of centimetre-sized crystals. K[H₂N(CH₂COO)₂] remained thermally stable up to 210 °C in an air atmosphere. This research offers a new approach to further explore solar-blind UV NLO crystals.

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一种卓越的日盲紫外非线性光学晶体，具有综合性能和增强的热稳定性

太阳盲紫外非线性光学（NLO）晶体在现代激光器中有着重要的应用。本文通过碱金属阳离子的调谐，合理地获得了一种出色的日盲紫外NLO晶体K[H2N(CH2COO)2]。有趣的是，我们注意到[H2N(CH2COO)2]基团以有序的排列排列在螺旋链之间，叠加了它们的微观二阶敏感性。值得注意的是，K[H2N(CH2COO)2]表现出全面的NLO性能，包括在1064 nm处具有1.6 × KDP的强相位匹配SHG响应，在532 nm处具有0.6 × BBO的强相位匹配SHG响应，在1064 nm处具有0.124的合适双折射，高达332 MW cm - 2的高LDT， 216 nm的明显紫外截止边，覆盖246-1554 nm的宽高透明窗口，最短相位匹配波长延伸至250 nm，易于生长厘米大小的晶体。K[H2N(CH2COO)2]在大气中温度高达210°C时仍保持热稳定性。该研究为进一步探索日盲紫外NLO晶体提供了新的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Chemistry Frontiers Materials Science-Materials Chemistry

CiteScore

12.00

自引率

2.90%

发文量

313

期刊介绍： Materials Chemistry Frontiers focuses on the synthesis and chemistry of exciting new materials, and the development of improved fabrication techniques. Characterisation and fundamental studies that are of broad appeal are also welcome. This is the ideal home for studies of a significant nature that further the development of organic, inorganic, composite and nano-materials.