Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | L021104 |
| Fachzeitschrift | Physical Review A |
| Jahrgang | 104 |
| Ausgabenummer | 2 |
| Publikationsstatus | Veröffentlicht - 27 Aug. 2021 |
Abstract
Above-threshold ionization (ATI) of atoms in intense laser pulses produces photoelectron momentum distributions that exhibit discrete concentric circles related to the absorption of more photons than required to exceed the ionization threshold. Using numerical solutions of the one-electron time-dependent Schrödinger equation beyond the electric dipole approximation for circularly polarized laser pulses, we show that the geometric centers of ATI rings are counterintuitively shifted against the propagation direction of the light, i.e., in the direction opposite to the on-average transferred photon momentum. From a comparison with a simple model based on energy considerations, we identify a nondipole modification of the ac Stark effect for electron continuum states as the origin of our observation.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Atom- und Molekularphysik sowie Optik
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in: Physical Review A, Jahrgang 104, Nr. 2, L021104, 27.08.2021.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Nondipole modification of the ac Stark effect in above-threshold ionization
AU - Brennecke, Simon
AU - Lein, Manfred
N1 - Funding Information: We thank Reinhard Dörner and Sebastian Eckart for fruitful discussions. S.B. thanks the German Academic Exchange Service (DAAD) for financial support.
PY - 2021/8/27
Y1 - 2021/8/27
N2 - Above-threshold ionization (ATI) of atoms in intense laser pulses produces photoelectron momentum distributions that exhibit discrete concentric circles related to the absorption of more photons than required to exceed the ionization threshold. Using numerical solutions of the one-electron time-dependent Schrödinger equation beyond the electric dipole approximation for circularly polarized laser pulses, we show that the geometric centers of ATI rings are counterintuitively shifted against the propagation direction of the light, i.e., in the direction opposite to the on-average transferred photon momentum. From a comparison with a simple model based on energy considerations, we identify a nondipole modification of the ac Stark effect for electron continuum states as the origin of our observation.
AB - Above-threshold ionization (ATI) of atoms in intense laser pulses produces photoelectron momentum distributions that exhibit discrete concentric circles related to the absorption of more photons than required to exceed the ionization threshold. Using numerical solutions of the one-electron time-dependent Schrödinger equation beyond the electric dipole approximation for circularly polarized laser pulses, we show that the geometric centers of ATI rings are counterintuitively shifted against the propagation direction of the light, i.e., in the direction opposite to the on-average transferred photon momentum. From a comparison with a simple model based on energy considerations, we identify a nondipole modification of the ac Stark effect for electron continuum states as the origin of our observation.
UR - http://www.scopus.com/inward/record.url?scp=85114152900&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.104.L021104
DO - 10.1103/PhysRevA.104.L021104
M3 - Article
AN - SCOPUS:85114152900
VL - 104
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 2
M1 - L021104
ER -