Ultrafast preparation and detection of ring currents in single atoms

S Eckart, M Kunitski, M Richter, A Hartung, J Rist… - Nature Physics, 2018 - nature.com
Quantum particles can penetrate potential barriers by tunnelling. If that barrier is rotating, the
tunnelling process is modified,. This is typical for electrons in atoms, molecules or solids …

Electron spin polarization in strong-field ionization of xenon atoms

A Hartung, F Morales, M Kunitski, K Henrichs… - Nature …, 2016 - nature.com
As a fundamental property of the electron, the spin plays a decisive role in the electronic
structure of matter, from solids to molecules and atoms, for example, by causing magnetism …

Ionization in intense laser fields beyond the electric dipole approximation: concepts, methods, achievements and future directions

J Maurer, U Keller - Journal of Physics B: Atomic, Molecular and …, 2021 - iopscience.iop.org
The electric dipole approximation is widely used in atomic, molecular and optical physics
and is typically related to a regime for which the wavelength is much larger than the atomic …

Spin and angular momentum in strong-field ionization

D Trabert, A Hartung, S Eckart, F Trinter, A Kalinin… - Physical review …, 2018 - APS
The spin polarization of electrons from multiphoton ionization of Xe by 395 nm circularly
polarized laser pulses at 6× 10 13 W/cm 2 has been measured. At this photon energy of 3.14 …

Numerical verification of the theory of nonadiabatic tunnel ionization in strong circularly polarized laser fields

I Barth, M Lein - Journal of Physics B: Atomic, Molecular and …, 2014 - iopscience.iop.org
We verify the theory of nonadiabatic ionization of degenerate valence ${{p} _ {\pm}} $
orbitals in strong circularly polarized laser fields by numerically solving the two-dimensional …

Attosecond imaging of electronic wave packets

GA Stewart, P Hoerner, DA Debrah, SK Lee… - Physical Review Letters, 2023 - APS
An electronic wave packet has significant spatial evolution besides its temporal evolution,
due to the delocalized nature of composing electronic states. The spatial evolution was not …

Strong field-induced quantum dynamics in atoms and small molecules

S Eckart - Journal of Physics B: Atomic, Molecular and Optical …, 2024 - iopscience.iop.org
High-intensity laser fields can ionize atoms and molecules and also initiate molecular
dissociation. This review is on the recent progress made using experiments that harness the …

Control of attosecond light polarization in two-color bicircular fields

Á Jiménez-Galán, N Zhavoronkov, D Ayuso, F Morales… - Physical Review A, 2018 - APS
We develop theoretically and confirm both numerically and experimentally a comprehensive
analytical model which describes the propensity rules in the emission of circularly polarized …

Spin-polarizing interferometric beam splitter for free electrons

MM Dellweg, C Müller - Physical review letters, 2017 - APS
A spin-polarizing electron beam splitter is described that relies on an arrangement of linearly
polarized laser waves of nonrelativistic intensity. An incident electron beam is first coherently …

Attosecond control of spin polarization in electron–ion recollision driven by intense tailored fields

D Ayuso, A Jiménez-Galán, F Morales… - New Journal of …, 2017 - iopscience.iop.org
Tunnel ionization of noble gas atoms driven by a strong circularly polarized laser field in
combination with a counter-rotating second harmonic generates spin-polarized electrons …