https://english.news.cn/20260129/ae63877efeff493eb96eb79705cd05d8/c.html
https://www.nature.com/articles/s41586-025-10007-z
Scientists at the CAS Xinjiang Technical Institute of Physics and Chemistry have developed a new type of crystal, marking a significant advance in the field of vacuum ultraviolet laser light, according to the
For developing compact, efficient all-solid-state vacuum ultraviolet lasers, nonlinear optical crystals are the core component for probing, as their properties directly determine the output wavelength and conversion efficiency. For decades, potassium beryllium fluoroborate (KBBF) was the standard material.
The team mastered crystal growth techniques to obtain centimeter-sized, high-optical-quality crystals of ammonium fluorooxoborate NH4B4O6F (ABF). The ABF crystal can achieve phase matching down to a record-short wavelength of 158.9 nm, thereby setting a new benchmark for vacuum ultraviolet laser output via birefringent phase matching.
