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Type: Journal article
Title: Relativistic nondipole effects in strong-field atomic ionization at moderate intensities
Author: Haram, N.
Ivanov, I.
Xu, H.
Kim, K.T.
Atia-tul-Noor, A.
Sainadh, U.S.
Glover, R.D.
Chetty, D.
Litvinyuk, I.V.
Sang, R.T.
Citation: Physical Review Letters, 2019; 123(9):093201-1-093201-6
Publisher: American Physical Society
Issue Date: 2019
ISSN: 0031-9007
Statement of
Nida Haram, Igor Ivanov, Han Xu, Kyung Taec Kim, A. Atia-tul-Noor, U. Satya Sainadh, R.D. Glover, D. Chetty, I.V. Litvinyuk, and R.T. Sang
Abstract: We present a detailed experimental and theoretical study on the relativistic nondipole effects in strong-field atomic ionization by near-infrared linearly polarized few-cycle laser pulses in the intensity range of 10¹⁴–10¹⁵  W/cm². We record high-resolution photoelectron momentum distributions of argon using a reaction microscope and compare our measurements with a truly ab initio fully relativistic 3D model based on the time-dependent Dirac equation. We observe counterintuitive peak shifts of the transverse electron momentum distribution in the direction opposite to that of laser propagation as a function of laser intensity and demonstrate an excellent agreement between the experimental results and theoretical predictions.
Rights: © 2019 American Physical Society
DOI: 10.1103/PhysRevLett.123.093201
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