Related papers: Attosecond Rabi Oscillations in High Harmonic Generation Resonantly Driven by Extreme Ultraviolet Laser Fields

Attosecond Rabi Oscillations in High Harmonic Generation Resonantly Driven by Extreme Ultraviolet Laser Fields

URL: http://arxiv.org/abs/2404.04053v2
Date: Mon, 8 Apr 2024 09:01:25 GMT
Title: Attosecond Rabi Oscillations in High Harmonic Generation Resonantly Driven by Extreme Ultraviolet Laser Fields
Authors: Alba de las Heras, Carlos Hernández-García, Javier Serrano, Aleksandar Prodanov, Dimitar Popmintchev, Tenio Popmintchev, Luis Plaja,
Abstract summary: High-order harmonic generation driven by intense extreme ultraviolet (EUV) fields merges quantum optics and attosecond science. We theoretically investigate ultrafast resonant dynamics during the interaction of He atoms with strong EUV pulses.
Score: 36.37753021661126
License: http://creativecommons.org/licenses/by/4.0/
Abstract: High-order harmonic generation driven by intense extreme ultraviolet (EUV) fields merges quantum optics and attosecond science, giving rise to an appealing route for the generation of coherent EUV and soft X-ray light for high-resolution imaging and spectroscopies. We theoretically investigate ultrafast resonant dynamics during the interaction of He atoms with strong extreme ultraviolet pulses. At high driving intensities, we identify record fast attosecond Rabi oscillations imprinting observable signatures in the high harmonic spectrum. At field strengths suppressing the Coulomb potential barrier for all the bounded states, we demonstrate the survival of the attosecond two-level dynamics for several Rabi cycles. Consequently, this intense EUV laser-atom interaction reveals a new strong-field scenario where the resonant coupling of two-level bound-bound transitions prevails, contrasting with the dominance of bound-continuum transitions in the conventional strong-field infrared regimes. These findings set an interesting perspective for extreme attosecond nonlinear optics with intense short-wavelength fields.

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