摘要
非线性光学晶体材料是激光技术、光通信、光信息处理及光电子学等领域的关键基础材料，能够实现激光频率的转换、调制和调控，在现代光学技术中具有不可替代的地位。本文重点综述了2019—2024年新型非线性光学晶体材料的发展，并结合经典材料体系介绍其研究基础。首先，阐述了非线性光学效应的基本原理、晶体材料的核心性能参数及研究背景。其次，重点综述了深紫外非线性光学晶体材料的研究进展，包括氟化硼酸盐、混合配位硼磷酸盐及硼酸盐卤化物等新型材料体系的设计与性能优化。进一步，综述了红外非线性光学晶体材料的研究进展，涵盖硫属化合物、磷酸盐及金属氧卤化物等材料体系的探索与应用。随后，分析了第一性原理设计、数据驱动方法及多孔晶体材料等理论设计与新型材料体系的前沿进展。最后，从理性结构设计、短波紫外材料、金属氧卤化物及硝酸盐体系等方向展望了非线性光学晶体材料的未来发展趋势。本文旨在为非线性光学晶体材料的深入研究和工程应用提供理论参考。
关键词： 非线性光学晶体；深紫外；红外；倍频效应；第一性原理设计；氟化硼酸盐
Abstract
Nonlinear optical crystal materials are key fundamental materials in laser technology, optical communication, optical information processing, and optoelectronics, enabling the conversion, modulation, and control of laser frequencies, and holding an irreplaceable position in modern optical technology. This paper systematically reviews the research progress in nonlinear optical crystal materials from 2019 to 2024. First, the basic principles of nonlinear optical effects, the core performance parameters of crystal materials, and the research background are explained. Second, the research progress in deep ultraviolet nonlinear optical crystal materials is reviewed, including the design and performance optimization of novel material systems such as fluorinated borates, mixed coordinated borophosphates, and borate halides. Furthermore, the research progress in infrared nonlinear optical crystal materials is reviewed, covering the exploration and application of material systems such as chalcogenides, phosphates, and metal oxyhalides. Subsequently, the cutting-edge progress in theoretical design and novel material systems, including first-principles design, data-driven methods, and porous crystal materials, is analyzed. Finally, the future development trends of nonlinear optical crystal materials are discussed from the perspectives of rational structural design, short-wavelength ultraviolet materials, metal oxyhalides, and nitrate systems. This paper aims to provide theoretical reference for in-depth research and engineering applications of nonlinear optical crystal materials.
Key words： Nonlinear optical crystal; Deep ultraviolet; Infrared; Frequency doubling effect; First-principles design; Fluorooxoborates
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