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arXiv · 1808.00137

Relativistic non-dipole effects in strong-field atomic ionization at moderate intensities

Nida Haram·Igor Ivanov·Han Xu·Kyung T. Kim·Atia-tul-Noor·U. Satya Sainadh·R. D. Glover·D. Chetty·Igor Litvinyuk·R. T. Sang
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Abstract

We present a detailed experimental and theoretical study on the relativistic non-dipole effects in strong-field atomic ionisation by near-infrared linearly-polarised few-cycle laser pulses in the intensity range 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 counter-intuitive 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 experimental results and theoretical predictions.

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Nida Haram, Igor Ivanov, Han Xu, Kyung T. Kim, Atia-tul-Noor, U. Satya Sainadh, R. D. Glover, D. Chetty, Igor Litvinyuk, R. T. Sang. 2019-04-02. Relativistic non-dipole effects in strong-field atomic ionization at moderate intensities. https://doi.org/10.1103/physrevlett.123.093201

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