近日，188比分直播:新疆理化技术研究所潘世烈团队研究了NH4B4O6F晶体中真空紫外二次谐波的产生。2026年1月28日出版的《自然》杂志发表了这项成果。

真空紫外（VUV，100–200 nm）光源在先进光谱学、量子研究与半导体光刻等领域至关重要。相比传统的大规模真空紫外光产生技术，通过非线性光学晶体进行倍频（SHG）是最简单高效的途径。然而，合适非线性光学晶体的稀缺限制了利用倍频产生真空紫外光的发展：现有材料或无法满足相位匹配要求，或转换效率低下，或存在严重的生长限制。

研究组报道了氟氧硼酸盐晶体NH4B4O6F（简称ABF）作为一种有前景的真空紫外光产生材料的开发成果。通过构建具有特定相位匹配角的真空紫外器件，研究组实现了创纪录的158.9 nm相位匹配倍频光输出，并在177.3 nm波长处获得了最高达4.8毫焦的纳秒脉冲能量，转换效率为5.9%。其增强的非线性光学性能归因于氟基单元优化排列所形成的不对称子晶格结构。这项工作为非线性光学领域提供了新材料，有望在基于ABF的紧凑型高功率真空紫外激光器中获得应用。

附：英文原文

Title: Vacuum ultraviolet second-harmonic generation in NH4B4O6F crystal

Author: Zhang, Fangfang, Chen, Zilong, Cui, Chen, Yang, Zhihua, Mutailipu, Miriding, Li, Fuming, Hou, Xueling, Long, Xifa, Pan, Shilie

Issue&Volume: 2026-01-28

Abstract: Vacuum ultraviolet (VUV, 100–200nm) light sources are crucial for advanced spectroscopy, quantum research and semiconductor lithography1,2,3. Compared with conventional large-scale VUV generation technologies4,5,6,7, second-harmonic generation (SHG) through nonlinear optical (NLO) crystals8,9,10 is the simplest and most efficient method. However, the scarcity of suitable NLO crystals has constrained the production of VUV light through SHG: existing materials fail to meet phase-matching requirements, suffer from low conversion efficiency or have severe growth limitations11,12,13,14,15,16,17,18,19. In this study, we report the development of the fluorooxoborate crystal NH4B4O6F (abbreviated as ABF) as a promising material for VUV light generation. VUV devices with specific phase-matching angles were constructed, achieving a record 158.9-nm light through phase-matching SHG and a maximum nanosecond pulse energy of 4.8mJ at 177.3nm with a conversion efficiency of 5.9%. The enhanced NLO performance is attributed to optimized arrangements of fluorine-based units creating asymmetric sublattices. This work provides further material in the NLO field, with potential for applications in compact, high-power VUV lasers using ABF.

DOI: 10.1038/s41586-025-10007-z

Source: https://www.nature.com/articles/s41586-025-10007-z