Laser-induced electron Fresnel diffraction by XUV pulses at extreme intensity

Abstract

Ionization of atoms and molecules in laser fields can lead to various interesting interference structures in the photoelectron spectrum. For the case of a super-intense extreme ultraviolet laser pulse, we identify a novel petal-like interference structure in the electron momentum distribution along the direction of the laser field propagation. We show that this structure is quite general and can be attributed to the Fresnel diffraction of the electronic wavepacket by the nucleus. Our results are demonstrated by numerically solving the time-dependent Schrodinger equation of the atomic hydrogen beyond the dipole approximation. By building an analytical model, we find that the electron displacement determines the aforementioned interference pattern. In addition, we establish the physical picture of laser-induced electron Fresnel diffraction which is reinforced by both quantum and semiclassical models.

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• Partitioning of the linear photon momentum in multiphoton ionization
• Time Double-Slit Interference in Tunneling Ionization
• The tunneling model of laser-induced ionization and its failure at low frequencies
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Cited by in corpus (2)

• Laser-induced electron Fresnel diffraction in the tunneling and over-barrier ionization
• Photoelectron combs in ionization: Influence of rescattering and nondipole effects