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Recently, a team led by Gao Chunqing and Fu Shiyao from the School of Optoelectronics at Beijing University of Technology combined optical spatial coordinate transformation with photon spin Hall effect to construct a photon angular momentum filter for the first time internationally, achieving on-demand regulation of photon spin angular momentum and orbital angular momentum.The related achievements...
The attosecond light source has the characteristics of ultra short pulse width, short wavelength, high coherence, and high-precision synchronous control, and has extremely high potential for application in the field of ultrafast imaging. Especially when the attosecond light source reaches the "water window" band, oxygen and hydrogen atoms have weak absorption of X-rays in this band, so water is re...
The project of the National Natural Science Foundation of China (Jilin Province) "Multicolor Transparent Silicate Garnet Fluorescent Ceramics for Laser Lighting" presided over by Zhang Jiahua, a researcher in the State Key Laboratory of Luminescence and Applications of Changchun Institute of Optics and Fine Mechanics, has made breakthrough progress, developed green fluorescent transparent ceramics...
The 3500W free output blue semiconductor laser beam is output in a free space manner, with a rectangular spot directly acting on the material surface without the need for fiber optics or laser processing heads. This laser has a wavelength of 455 ± 10nm, with continuously adjustable power and a maximum output power of over 3500W. It is mainly used for non-ferrous metal cladding, quenching, etc., to...
Conservation of energy is a fundamental concept in physics that can be used to explain anything from planetary orbits to the internal workings of individual atoms.Energy can be converted into other forms, but the overall energy level is usually considered to vary over time. Therefore, when attempting to describe a system, physicists usually pay attention to ensuring that it is isolated from the su...