Non-Perturbative Above-Threshold Ionization Driven by X-Ray Free-Electron Lasers

POSTER

Abstract

We explore a new frontier in non-perturbative strong-field physics made possible by the latest advances in X-Ray Free-Electron Laser (XFEL) technology, which extends multiphoton above-threshold ionization (ATI) from the well-explored visible/infrared into the new attosecond X-ray regime. In helium, distinct angular and spectral signatures emerge, isolated from perturbative harmonic contributions. We develop a theoretical framework that enables ultrafast probing and control of non-perturbative dynamics, paving the way for future short-wavelength strong-field experiments.

*We wish to thank the U.S. Department of Energy, Office of Basic Energy Sciences, Atomic, Molecular, and Optical Sciences Program for supporting this work under Awards No. DE-SC0022093 (A.S.L. and S.W. ) and DE-FG02-04ER15614 (L.F.D.). Y.T. also acknowledges partial support from the National Science Foundation Grant No. PHY-2207439. Support for T.D. and J.P.C. was provided by the U.S. DOE BES AMOS program.

Presenters

  • Spencer Roman Walker

    • Ohio State University

Authors

  • Spencer Roman Walker

    • Ohio State University

  • Yaguo Tang

    • Ohio State University

  • Igor Ivanov

    • Research School of Physics, Australian National University, Canberra, ACT 2601, Australia

  • James P Cryan

    • SLAC National Accelerator Laboratory

  • Taran Driver

    • SLAC National Accelerator Laboratory

  • Daniel Reed Tuthill

    • Ohio State University

  • Pierre Agostini

    • Ohio State University

  • Louis Franklin DiMauro

    • Ohio State University

  • Alexandra S Landsman

    • Ohio State University