Attosecond flashes of light are born in a highly nonlinear optical process called high-order harmonic generation, which is based on laser-driven electron acceleration within a single optical cycle ...

Attosecond physics is the study of atomic-scale ... academic and industry research have made a great effort in pushing further ultrafast laser technologies (e.g. high-order harmonic generations ...

More information: Jiawei Yan et al, Terawatt-attosecond hard X-ray free-electron laser at high repetition rate, Nature Photonics (2024). DOI: 10.1038/s41566-024-01566-0 Provided by European XFEL GmbH ...