Two-center interference and stereo Wigner time delay in photoionization of asymmetric molecules

Liao, Yijie; Zhou, Yueming; Pi, Liang-Wen; Ke, Qinghua; Liang, Jintai; Zhao, Yong; Li, Min; Lu, Peixiang

doi:10.1103/physreva.104.013110

Cited by 9 publications

(5 citation statements)

References 62 publications

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“…The results show that the time delays fluctuate as a function of photoelectron energy. The oscillation is traced back to the two-center interferences in the study of Liao et al [24]. To further verify this conclusion, we calculate the Wigner time delays using the analytical interference model described above.…”

Section: The Analytical Interference Modelmentioning

confidence: 68%

“…In this case, the multi-partial wave interference is expected to be strongly suppressed. Thus, it is reasonable to investigate the photoionization dynamics using TDSE with reduced dimension as demonstrated in recent works [20,24].…”

Section: Resultsmentioning

confidence: 99%

“…Nandi et al found in the RABBITT experiment of N 2 that the corresponding variations in the ionization time can be as large as 200 attoseconds (as) due to the tiny changes in the molecular potential barrier [23]. Liao et al found the oscillatory structures in the photoionization time delays of asymmetry molecules and attributed it to the two-center interference [24]. The experimental observation of two-center interference in the photoionization time delays has been represented with krypton dimer recently [25].…”

Section: Introductionmentioning

confidence: 99%

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Backward scattering impact on the photoionization time delay of asymmetric molecules

Chen¹,

Cao²,

Zhan³

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

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The time delays in photoionization of asymmetric diatomic molecules are numerically investigated using the technique of reconstruction of attosecond beating by interference of two-photon transitions (RABBITT). Our results show that two different oscillatory structures appear in the molecular photoionization time delays as the photoelectron energy changes, and the contribution of these two oscillations to the time delays varies with the nuclear distance. By using an analytical interference model, we demonstrate that one oscillation is traced back to the two-center interference and the other originates from the photoelectrons backward scattering. With the increases of internuclear distance, the backward scattering impact on the time delays is gradually distinct in a particular direction of the photoionization. The amplitude of the backward scattering induced oscillation decreases when the photoelectron energy increases. Furthermore, the stereo RABBITT time delays display a distinct downshift as the increases of asymmetry degree of molecules, which is attributed to the increasing depth of the additional Coulomb potential experienced by the ionized electrons.

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Section: The Analytical Interference Modelmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Backward scattering impact on the photoionization time delay of asymmetric molecules

Chen¹,

Cao²,

Zhan³

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

Self Cite

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show abstract

“…For photoemission from diatomic molecules, the constructive and destructive interference between the wave packets emitted or scattered from the two atoms leads to a modulation of the photoionization time delay depending on the photoelectron energy. [101][102][103] In this scenario, the nuclear motion during bond softening also leads to a substantial effect on the photoionization time delay, [104] which has been measured recently. [105] Generally speaking, attosecond electron dynamics is an important topic in ultrafast science and its study has led to a variety of novel findings.…”

Section: Recent Advancesmentioning

confidence: 89%

Attosecond ionization time delays in strong-field physics

Ma 马,

Ni 倪,

Wu 吴

2024

Chinese Phys. B

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Electronic processes within atoms and molecules reside on the timescale of attoseconds. Recent advances in the laser-based pump-probe interrogation techniques have made possible the temporal resolution of ultrafast electronic processes on the attosecond timescale, including photoionization and tunneling ionization. These interrogation techniques include the attosecond streak camera, the reconstruction of attosecond beating by interference of two-photon transitions, and the attoclock. While the former two are usually employed to study photoionization processes, the latter is typically used to investigate tunneling ionization. In this Topical Review, we briefly overview these timing techniques towards an attosecond temporal resolution of ionization processes in atoms and molecules under intense laser fields. In particular, we review the backpropagation method, which is a novel hybrid quantum-classical approach towards full characterization of tunneling ionization dynamics. Continued advances in the interrogation techniques promise to pave the pathway towards the exploration of ever faster dynamical processes on an ever shorter timescale.

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“…Recent applications of RABBITT to molecular photoionization include attosecond resolution of coupled electron and nuclear dynamics in dissociative ionization of H 2 [5] and orientation-dependent time delay and electron localization studies in CO [6]. The latter work stimulated a further theoretical study by Liao et al [7]. RABBITT allowed to measure the photoelectron group delay in the shape resonance region of various molecules: N 2 [8,9], CO 2 [10], NO [11] and CF 4 [12,13].…”

mentioning

confidence: 99%

XUV ionization of the H₂ molecule studied with attosecond angular streaking

Serov¹,

Kheifets²

2023

J. Phys. B: At. Mol. Opt. Phys.

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We study orientation and two-center interference eﬀects in attosecond time-resolved photoionization of the H2molecule. Time resolution of XUV ionization of H2 is gained through the phase retrieval capability of attosecond angular streaking demonstrated earlier by Kheifets et al [[Phys. Rev. A 106, 033106 (2022)]. Once applied to H2 , this technique delivers an anisotropic phase and time delay which both depend sensitively on the molecular axis orientation. In addition, the photoelectron momentum distribution displays a very clear two-center interference pattern. When the interference formula of Walter and Briggs [J. Phys. B 32 2487 (1999)] is applied, an eﬀective photoelectron momentum appears to be greater than the asymptotic momentum at the detector. This eﬀect is explained by a molecular potential well surrounding the photoemission center.

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Two-center interference and stereo Wigner time delay in photoionization of asymmetric molecules

Cited by 9 publications

References 62 publications

Backward scattering impact on the photoionization time delay of asymmetric molecules

Backward scattering impact on the photoionization time delay of asymmetric molecules

Attosecond ionization time delays in strong-field physics

XUV ionization of the H₂ molecule studied with attosecond angular streaking

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Two-center interference and stereo Wigner time delay in photoionization of asymmetric molecules

Cited by 9 publications

References 62 publications

Backward scattering impact on the photoionization time delay of asymmetric molecules

Backward scattering impact on the photoionization time delay of asymmetric molecules

Attosecond ionization time delays in strong-field physics

XUV ionization of the H2 molecule studied with attosecond angular streaking

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Product

Resources

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XUV ionization of the H₂ molecule studied with attosecond angular streaking