Nonlinear Processes of Atoms in Intense EUV Free-Electron Laser Fields

Abstract

The advances in free electron laser (FEL) technology allow us to generate intense laser fields in extreme ultraviolet (EUV) and X-ray. Recent studies show that responses of materials to such high-frequency intense laser fields are inherently different from those observed in visible and infrared. In this reveiw, we discuss current progresses in intense laser field physics in EUV and X-ray, especially by focussing on non-linear responses of isolated atoms.