Relativistic Nondipole Effects in Strong-Field Atomic Ionization at Moderate Intensities

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 ar...

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Bibliographic Details
Published in:Physical review letters 2019-08, Vol.123 (9), p.1, Article 093201
Main Authors: Haram, Nida, Ivanov, Igor, Xu, Han, Kim, Kyung Taec, Atia-tul-Noor, A., Sainadh, U. Satya, Glover, R. D., Chetty, D., Litvinyuk, I. V., Sang, R. T.
Format: Article
Language:English
Subjects:
Argon
Dirac equation
Infrared lasers
Ionization
Lasers
Linear polarization
Momentum
Photoelectrons
Relativism
Relativistic effects
Three dimensional models
Time dependence
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.123.093201