China has made breakthrough in the research of miniaturized coherent light sourc

According to CCTV News, the Shanghai Institute of Optics and Precision Machinery of the Chinese Academy of Sciences has made breakthrough in the research field of miniaturized free electron coherent light sources, and researchers have realized a new type of miniaturized coherent light sources. Relevant research results were published in the journal Nature today (November 3).

Miniaturized free electron coherent light source

According to the introduction on the WeChat official account of Shanghai Institute of Optics and Mechanics, the research team experimentally explored the dynamic process of surface plasmon polariton (SPP) pumped by ultrashort electron pulse driven by femtosecond laser. Through observing the dynamic process of coherent amplification of SPP pumped by free electron pulse, the stimulated amplification mechanism in the process of interaction between free electron and SPP was expounded. The research adopts ultrafast optical technology to detect the whole process of amplification of free electron stimulated radiation. The research results indicate a new way to achieve coherent amplification by using free electron pumped SPP, which is of great significance for the development of miniaturized/integrated coherent light sources.

Schematic diagram of experimental scheme of miniaturized free electron coherent light source

It is reported that the coherent light source is a laser with directional collimation, high energy and good monochromaticity. It has always been the goal of laser science to improve the radiation power of the laser, pursue a wider and tunable spectrum, and achieve a light source with smaller size and lower cost. The new laser obtained in this research turns the original low brightness and low energy surface light into a high energy surface laser, which is of great significance in communication, sensing, spectral measurement, information processing and other fields.

Source: Home of IT