Acceleration of Neutral Atoms by Strong Short-Wavelength Short-Range Electromagnetic Pulses

Nondipole terms in the atom–laser interaction arising due to the presence of a magnetic component in an electromagnetic wave and its inhomogeneity lead to the nonseparability of the center-of-mass (CM) and electron variables in the neutral atom and, as a consequence, to its acceleration. We investig...

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Bibliographic Details
Published in:Photonics 2023-12, Vol.10 (12), p.1290
Main Authors: Melezhik, Vladimir S., Shadmehri, Sara
Format: Article
Language:English
Subjects:
Approximation
atomic acceleration
Charged particles
Electric waves
Electromagnetic pulses
Electromagnetic radiation
Electromagnetic waves
Electromagnetism
Hydrogen
Hydrogen atoms
Inhomogeneity
Investigations
Ionization
Lasers
Linear polarization
Neutral atoms
nondipole effects
Probability
quantum-quasiclassical approach
Schrodinger equation
strong laser field
Variables
Velocity
Wavelength
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Summary:Nondipole terms in the atom–laser interaction arising due to the presence of a magnetic component in an electromagnetic wave and its inhomogeneity lead to the nonseparability of the center-of-mass (CM) and electron variables in the neutral atom and, as a consequence, to its acceleration. We investigate this effect and the accompanying excitation and ionization processes for the hydrogen atom in strong (1012 – 2×1014 W/cm2) linearly polarized short-wavelength (5 eV ≲ℏω≲ 27 eV) electromagnetic pulses of about 8 fs duration. The study was carried out within the framework of a hybrid quantum-quasiclassical approach in which the coupled time-dependent Schrödinger equation for an electron and the classical Hamilton equations for the CM of an atom were simultaneously integrated. Optimal conditions with respect to the frequency and intensity of the electromagnetic wave for the acceleration of atoms without their noticeable ionization were found in the analyzed region.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics10121290