Details
| Original language | English |
|---|---|
| Article number | 043418 |
| Journal | Physical Review A |
| Volume | 98 |
| Issue number | 4 |
| Publication status | Published - 15 Oct 2018 |
Abstract
We investigate dissociative single and double ionization of HeH+ induced by intense femtosecond laser pulses. By employing a semiclassical model with nuclear trajectories moving on field-dressed surfaces and ionization events treated as stochastical jumps, we identify a strong-field mechanism wherein the molecules dynamically align along the laser polarization axis and stretch towards a critical internuclear distance before dissociative ionization. As the tunnel-ionization rate is larger for larger internuclear distances and for aligned samples, ionization is enhanced. The strong dynamical rotation originates from the anisotropy of the internuclear distance-dependent polarizability tensor, which features a maximum at certain internuclear distances. Good qualitative agreement with our experimental observations is found. Finally, we investigate under which experimental conditions isotope effects of different isotopologues of HeH+ can be observed.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 98, No. 4, 043418, 15.10.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Strong-field polarizability-enhanced dissociative ionization
AU - Yue, Lun
AU - Wustelt, Philipp
AU - Sayler, A. Max
AU - Oppermann, Florian
AU - Lein, Manfred
AU - Paulus, Gerhard G.
AU - Gräfe, Stefanie
N1 - Funding Information: The authors acknowledge support from the German Research Foundation (DFG-SPP-1840 “Quantum Dynamics in Tailored Intense Fields”). L.Y. thanks Johannes Steinmetzer for aiding in the calculation of the molecular polarizabilities. Publisher Copyright: © 2018 American Physical Society. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/10/15
Y1 - 2018/10/15
N2 - We investigate dissociative single and double ionization of HeH+ induced by intense femtosecond laser pulses. By employing a semiclassical model with nuclear trajectories moving on field-dressed surfaces and ionization events treated as stochastical jumps, we identify a strong-field mechanism wherein the molecules dynamically align along the laser polarization axis and stretch towards a critical internuclear distance before dissociative ionization. As the tunnel-ionization rate is larger for larger internuclear distances and for aligned samples, ionization is enhanced. The strong dynamical rotation originates from the anisotropy of the internuclear distance-dependent polarizability tensor, which features a maximum at certain internuclear distances. Good qualitative agreement with our experimental observations is found. Finally, we investigate under which experimental conditions isotope effects of different isotopologues of HeH+ can be observed.
AB - We investigate dissociative single and double ionization of HeH+ induced by intense femtosecond laser pulses. By employing a semiclassical model with nuclear trajectories moving on field-dressed surfaces and ionization events treated as stochastical jumps, we identify a strong-field mechanism wherein the molecules dynamically align along the laser polarization axis and stretch towards a critical internuclear distance before dissociative ionization. As the tunnel-ionization rate is larger for larger internuclear distances and for aligned samples, ionization is enhanced. The strong dynamical rotation originates from the anisotropy of the internuclear distance-dependent polarizability tensor, which features a maximum at certain internuclear distances. Good qualitative agreement with our experimental observations is found. Finally, we investigate under which experimental conditions isotope effects of different isotopologues of HeH+ can be observed.
UR - http://www.scopus.com/inward/record.url?scp=85054781560&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.98.043418
DO - 10.1103/PhysRevA.98.043418
M3 - Article
AN - SCOPUS:85054781560
VL - 98
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 4
M1 - 043418
ER -