The invention of the laser marked a milestone in modern science and technology. Inorganic second-order nonlinear optical (NLO) crystals, with their unique frequency conversion capabilities, play a critical role in extending laser wavelength ranges. These materials are indispensable in laser science, information transmission, and other fields such as the industrial Internet. As Moore’s Law drives the demand for shorter wavelengths and higher-precision laser sources, the development of high-performance short-wave ultraviolet (UV) (<300 nm) NLO materials for UV solid-state lasers has become increasingly important. While researchers have synthesized a variety of NLO crystals, their discovery has largely relied on trial-and-error approaches, which are not only time-consuming but also serendipitous rather than based on rational design principles. Moreover, the complexity of designing these materials is compounded by the need to meet several strict functional criteria, including a short UV cutoff edge, a strong second-harmonic generation (SHG) effect, and moderate birefringence, all of which hinder efficient synthesis. The rational design and controlled synthesis of high-performance short-wave UV NLO crystals, therefore, remains a significant scientific challenge.

中文翻译：

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高性能无机短波紫外非线性光学材料的合理设计与可控合成


激光的发明标志着现代科学技术的里程碑。无机二阶非线性光学 （NLO） 晶体具有独特的频率转换能力，在扩展激光波长范围方面发挥着关键作用。这些材料在激光科学、信息传输和工业互联网等其他领域是必不可少的。随着摩尔定律推动了对更短波长和更高精度激光源的需求，用于紫外固体激光器的高性能短波紫外 （UV） （<300 nm） NLO 材料的开发变得越来越重要。虽然研究人员已经合成了各种 NLO 晶体，但他们的发现在很大程度上依赖于试错法，这种方法不仅耗时，而且是偶然的，而不是基于合理的设计原则。此外，设计这些材料的复杂性因需要满足几个严格的功能标准而变得更加复杂，包括短的 UV 截止边缘、强烈的二次谐波产生 （SHG） 效应和适度的双折射，所有这些都阻碍了高效合成。因此，高性能短波 UV NLO 晶体的合理设计和受控合成仍然是一项重大的科学挑战。