Wu Liming and Chen Ling group of Beijing Normal University first realized the same direction arrangement of asymmetric non π conjugated groups to improve the deep UV nonlinear optics

How to break through the limitation of the so-called "200 nm" wall, which limits the application of laser technology and the precision of micromachining, depends on the novel and efficient deep ultraviolet (DUV, λ 0.053), which is the maximum value of phosphate and fluorophosphate at present Combined with SHG frequency doubling experiment and theoretical prediction, the material can achieve 194 nm deep ultraviolet laser matching output, It is the highest output wavelength energy of phosphate and fluorophosphate The material has a strong frequency doubling effect (1.1 × KDP), and is expected to become a new generation of deep UV NLO crystal This research work was recently accepted and published by the Journal of American Chemical Society (J am Chem SOC., 2019, DOI: 10.1021/jacs.9b03858) Beijing Normal University is the only unit Lu Jing, Ph.D student of School of chemistry, Yue Jianing, Ph.D student of School of physics, Xiong Lin, Ph.D student of School of chemistry, is the first author of the paper The research was funded by NSFC, Beijing Normal University high level talent introduction fund, School of chemistry and Beijing Key Laboratory.