AI 中文总结
该研究结合欧洲XFEL硬X射线阿秒脉冲与全反射聚焦X射线光学元件，产生峰值强度约10^20 W/cm²的纳米聚焦硬X射线阿秒脉冲，为相关科学研究提供了新可能。
AI 中文摘要
通过将欧洲XFEL的硬X射线阿秒脉冲与全反射聚焦X射线光学元件相结合，我们产生了纳米聚焦的硬X射线阿秒脉冲，其强度和通量可与硬X射线领域达到的最高值相媲美。通过观察铜原子放大自发辐射的饱和现象，确认了约10^20 W/cm²的峰值强度。这些X射线脉冲为探索高阶非线性光-物质相互作用、无损伤结构测定以及原子和分子的相干控制等新科学机会提供了可能。
英文摘要
By combining hard x-ray attosecond pulses from the European XFEL with total-reflection focusing x-ray optics, we generated nanofocused hard x-ray attosecond pulses with intensities and fluences comparable to the highest values attained in the hard x-ray regime. A peak intensity on the order of 10$^{20}$ W/cm$^2$ is confirmed through the observation of saturation in amplified spontaneous emission from copper atoms. These x-ray pulses enable new scientific opportunities, including the exploration of higher-order nonlinear light--matter interactions, damage-free structure determination, and coherent control of atoms and molecules.
