Qprop with faster calculation of photoelectron spectra

V Tulsky, D Bauer - Computer Physics Communications, 2020 - Elsevier
The calculation of accurate photoelectron spectra (PES) for strong-field laser-atom
experiments is a demanding computational task, even in single-active-electron …

Shaped free-electron vortices

D Köhnke, T Bayer, M Wollenhaupt - Physical Review A, 2024 - APS
Since their first theoretical proposal [Ngoko Djiokap et al., Phys. Rev. Lett. 115, 113004
(2015) 0031-9007 10.1103/PhysRevLett. 115.113004] and experimental demonstration …

Structured photoelectron distributions in photodetachment induced by trains of laser pulses: Vortices versus spirals

L Geng, F Cajiao Vélez, JZ Kamiński, LY Peng… - Physical Review A, 2021 - APS
The formation of quantum vortices in photodetachment by a sequence of left-and right-
handed circularly polarized laser pulses in various configurations is analyzed using either …

Reversible electron spirals by chirped attopulses at zero time delay

NJ Strandquist Jr, JM Ngoko Djiokap - Physical Review A, 2022 - APS
A class of linear, spiral phenomena is discovered in the photoelectron momentum
distribution when studying photoionization of S-state atoms by a pair of linearly chirped …

Molecular free electron vortices in photoionization by polarization-tailored ultrashort laser pulses

T Bayer, M Wollenhaupt - Frontiers in Chemistry, 2022 - frontiersin.org
Atomic and molecular free electron vortices (FEVs), characterized by their spiral-shaped
momentum distribution, have recently attracted a great deal of attention due to their varied …

Orientation-dependent production of normal Archimedean and dynamical spirals for revealing orbital symmetries in diatomic multi-orbital molecules

HB Ambalampitiya, JM Ngoko Djiokap - Communications Physics, 2024 - nature.com
The discovery and measurements of symmetric normal Archimedean spirals from atomic
ionization by a pair of time-delayed broadband oppositely circularly polarized pulses …

Photoelectron momentum distributions in the strong-field ionization of atomic hydrogen by few-cycle elliptically polarized optical pulses

N Douguet, K Bartschat - Physical Review A, 2022 - APS
We investigate the strong-field ionization of atomic hydrogen in a few-cycle elliptically
polarized infrared pulse by solving the time-dependent Schrödinger equation. The …

Carrier-envelope-phase measurement of sub-cycle UV pulses using angular photofragment distributions

XX Dong, YR Liu, V Kimberg, O Vendrell, Y Wu… - Communications …, 2022 - nature.com
Abstract Carrier-envelope-phase (CEP) of sub-cycle ultraviolet (UV) pulse strongly
influences the dynamics of quantum systems, but its characterization is not accessible …

Transformation by Rabi oscillation of the photoelectron momentum distribution produced by oppositely circularly polarized laser pulses

EL Fulton, JM Ngoko Djiokap - Physical Review A, 2024 - APS
We report on the potential of coherent Rabi-type dynamics and the formation of the Autler-
Townes (AT) doublet to dramatically transform the patterns emerging in the photoelectron …

Ouroboros-pattern-like electron spirals by synchronous crossed chirped laser pulses

L Pedersen, JM Ngoko Djiokap - Physical Review A, 2024 - APS
By means of analytical calculations based on first-order perturbation theory within the
electric dipole, laser, and rotating wave approximations, we investigate the linear (in …