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Ivanov, Igor
초강력 레이저과학 연구단
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Strong-field ionization of argon: Electron momentum spectra and nondipole effects

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Title
Strong-field ionization of argon: Electron momentum spectra and nondipole effects
Author(s)
Haram, Nida; Xu, Han; Igor Ivanov; Chetty, Dashavir; Litvinyuk, Igor; Sang, R.T.
Publication Date
2022-02
Journal
Physical Review A, v.105, no.2
Publisher
American Physical Society
Abstract
©2022 American Physical SocietyWe investigate the influence of relativistic nondipole effects on the photoelectron spectra of argon, particularly in the low-kinetic-energy region (0-1 eV). In our experiment, we use intense, linearly polarized 800-nm laser pulses to ionize Ar from a jet and we record photoelectron energy and momentum distributions using a reaction microscope. Our measurements show that nondipole effects can cause an energy-dependent asymmetry along the laser propagation direction in the photoelectron energy and momentum spectra. Model simulation based on the time-dependent Dirac equation can reproduce our measurement results. Moreover, the electron trajectory analysis based on the classical model reveals that the photoelectrons obtain a negative momentum shift in the laser propagation direction due to the interplay between the Lorentz-force-induced radiation pressure during its free propagation in the continuum and rescattering by the Coulomb potential of the parent ion when it is driven back by the laser field.
URI
https://pr.ibs.re.kr/handle/8788114/11304
DOI
10.1103/PhysRevA.105.023522
ISSN
2469-9926
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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