Tunneling dynamics in multiphoton ionization and attoclock calibration

M Klaiber, KZ Hatsagortsyan, CH Keitel - Physical Review Letters, 2015 - APS
The intermediate domain of strong-field ionization between the tunneling and multiphoton
regimes is investigated using the strong-field approximation and the imaginary-time method …

Under-the-barrier dynamics in laser-induced relativistic tunneling

M Klaiber, E Yakaboylu, H Bauke, KZ Hatsagortsyan… - Physical Review Letters, 2013 - APS
The tunneling dynamics in relativistic strong-field ionization is investigated with the aim to
develop an intuitive picture for the relativistic tunneling regime. We demonstrate that the …

Generalized analytical description of relativistic strong-field ionization

M Klaiber, KZ Hatsagortsyan, CH Keitel - Physical Review A, 2024 - APS
A relativistic analytical theory of strong-field ionization applicable across the regimes of deep
tunneling up to over-the-barrier ionization (OTBI) is developed, accounting also for the …

Relativistic features and time delay of laser-induced tunnel ionization

E Yakaboylu, M Klaiber, H Bauke, KZ Hatsagortsyan… - Physical Review A, 2013 - APS
The electron dynamics in the classically forbidden region during relativistic tunnel ionization
is investigated. The classical forbidden region in the relativistic regime is identified by …

Subcycle time-resolved nondipole dynamics in tunneling ionization

M Klaiber, KZ Hatsagortsyan, CH Keitel - Physical Review A, 2022 - APS
The electron nondipole dynamics in tunneling ionization in an elliptically polarized laser
field is investigated theoretically using a relativistic Coulomb-corrected strong-field …

Relativistic and spin-orbit dynamics at nonrelativistic intensities in strong-field ionization

AS Maxwell, LB Madsen - Physical Review A, 2024 - APS
Spin-orbit dynamics and relativistic corrections to the kinetic energy in strong-field dynamics
have long been ignored for near-and mid-infrared fields with intensities 10 13–10 14 W/cm …

Nondipole Coulomb sub-barrier ionization dynamics and photon momentum sharing

PL He, M Klaiber, KZ Hatsagortsyan, CH Keitel - Physical Review A, 2022 - APS
The nondipole under-the-barrier dynamics of the electron during strong-field tunneling
ionization is investigated, examining the role of the Coulomb field of the atomic core. The …

Strong-field -matrix theory with final-state Coulomb interaction in all orders

FHM Faisal - Physical Review A, 2016 - APS
During the last several decades the so-called Keldysh-Faisal-Reiss or strong-field
approximation (SFA) has been highly useful for the analysis of atomic and molecular …

Nondipole time delay and double-slit interference in tunneling ionization

PL He, KZ Hatsagortsyan, CH Keitel - Physical Review Letters, 2022 - APS
Recently two-center interference in single-photon molecular ionization was employed to
observe a zeptosecond time delay due to the photon propagation of the internuclear …

Analytical approach to Coulomb focusing in strong-field ionization. I. Nondipole effects

J Daněk, KZ Hatsagortsyan, CH Keitel - Physical Review A, 2018 - APS
The role of the Coulomb potential of the atomic core for the creation of caustics in the
photoelectron momentum distribution for tunneling ionization in a linearly polarized strong …