Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 053438 |
| Fachzeitschrift | Physical Review A |
| Jahrgang | 101 |
| Ausgabenummer | 5 |
| Publikationsstatus | Veröffentlicht - 28 Mai 2020 |
Abstract
We explore the possibility of bicircular high-order harmonic spectroscopy to probe the laser-induced dynamics of molecules in a non-Born-Oppenheimer treatment. The numerical solutions of the time-dependent Schrödinger equation for aligned H2 and its isotopologs in ω-2ω bicircular fields show that the intensity ratio between D2 and H2 for harmonic orders 3q is lower than that for orders 3q±1(q∈N). Based on the strong-field approximation, we demonstrate that the interplay of vibrational wave-packet motion and dynamical-symmetry breaking leads to the different ratio. In general, the vibrational motion causes the ratio between isotopologs to increase with q for both harmonic orders 3q and 3q±1. On the other hand, the emission of orders 3q is possible only because of the alignment-induced breaking of the dynamical symmetry. The faster nuclear motion in H2 enhances the symmetry breaking, resulting in the lower D2/H2 ratio for the orders 3q. Therefore, the harmonic orders 3q give access to the attosecond probing of dynamical symmetries in molecules.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Atom- und Molekularphysik sowie Optik
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in: Physical Review A, Jahrgang 101, Nr. 5, 053438, 28.05.2020.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Probing dynamical symmetries by bicircular high-order harmonic spectroscopy beyond the Born-Oppenheimer approximation
AU - Yue, Shengjun
AU - Brennecke, Simon
AU - Du, Hongchuan
AU - Lein, Manfred
N1 - Funding Information: We gratefully acknowledge valuable discussions with Xiaosong Zhu. This work was supported by the China Scholarship Council (CSC) and the National Natural Science Foundation of China (Grant No. 11874030). We thank the Deutsche Forschungsgemeinschaft for support within the Priority Programme Quantum Dynamics in Tailored Intense Fields (QUTIF).
PY - 2020/5/28
Y1 - 2020/5/28
N2 - We explore the possibility of bicircular high-order harmonic spectroscopy to probe the laser-induced dynamics of molecules in a non-Born-Oppenheimer treatment. The numerical solutions of the time-dependent Schrödinger equation for aligned H2 and its isotopologs in ω-2ω bicircular fields show that the intensity ratio between D2 and H2 for harmonic orders 3q is lower than that for orders 3q±1(q∈N). Based on the strong-field approximation, we demonstrate that the interplay of vibrational wave-packet motion and dynamical-symmetry breaking leads to the different ratio. In general, the vibrational motion causes the ratio between isotopologs to increase with q for both harmonic orders 3q and 3q±1. On the other hand, the emission of orders 3q is possible only because of the alignment-induced breaking of the dynamical symmetry. The faster nuclear motion in H2 enhances the symmetry breaking, resulting in the lower D2/H2 ratio for the orders 3q. Therefore, the harmonic orders 3q give access to the attosecond probing of dynamical symmetries in molecules.
AB - We explore the possibility of bicircular high-order harmonic spectroscopy to probe the laser-induced dynamics of molecules in a non-Born-Oppenheimer treatment. The numerical solutions of the time-dependent Schrödinger equation for aligned H2 and its isotopologs in ω-2ω bicircular fields show that the intensity ratio between D2 and H2 for harmonic orders 3q is lower than that for orders 3q±1(q∈N). Based on the strong-field approximation, we demonstrate that the interplay of vibrational wave-packet motion and dynamical-symmetry breaking leads to the different ratio. In general, the vibrational motion causes the ratio between isotopologs to increase with q for both harmonic orders 3q and 3q±1. On the other hand, the emission of orders 3q is possible only because of the alignment-induced breaking of the dynamical symmetry. The faster nuclear motion in H2 enhances the symmetry breaking, resulting in the lower D2/H2 ratio for the orders 3q. Therefore, the harmonic orders 3q give access to the attosecond probing of dynamical symmetries in molecules.
UR - http://www.scopus.com/inward/record.url?scp=85085839766&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.101.053438
DO - 10.1103/PhysRevA.101.053438
M3 - Article
AN - SCOPUS:85085839766
VL - 101
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 5
M1 - 053438
ER -