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Area of Science:

  • Atomic Physics
  • Quantum Optics
  • Ultrafast Science

Background:

  • Intense X-ray and extreme ultraviolet (XUV) light sources are established tools.
  • Observing Rabi oscillations in the XUV range is experimentally difficult due to weak nonlinear interactions.

Purpose of the Study:

  • To propose a novel scheme for detecting XUV-induced Rabi oscillations.
  • To enable sensitive monitoring and control of ultrafast nonlinear dynamics in atoms and molecules.

Main Methods:

  • Numerical simulations of photoionization in a Helium medium using intense XUV pulses.
  • Analysis of superfluorescence (SF) spectra at the He⁺(3p-2s) transition.
  • Characterization of Rabi oscillations at the He⁺(1s-3p) transition.

Main Results:

  • The proposed scheme demonstrates strong population inversion and Rabi oscillations at the He⁺(1s-3p) transition.
  • Significant signatures of XUV-induced Rabi oscillations were identified in the SF spectra.
  • The photon energy of 48.36 eV for the XUV pulse was found to induce detectable Rabi oscillations.

Conclusions:

  • The suggested method provides a viable pathway to experimentally observe XUV-induced Rabi oscillations.
  • The technique offers a sensitive tool for probing and manipulating ultrafast nonlinear phenomena.
  • This research advances the understanding of light-matter interactions in the XUV regime.