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We study tunneling ionization of HeH+ in strong elliptical laser fields numerically and analytically. The calculated photoelectron momentum distribution (PMD) show two different offset angles corresponding to ionization events occurring in…

Atomic Physics · Physics 2025-11-18 Jiayin Che , Sheng Ye , Shiqi Shen , Weiyan Li , Yanjun Chen

We study the ionization dynamics of oriented HeH$^+$ in strong linearly-polarized laser fields by numerically solving the time-dependent Schr\"{o}dinger equation. The calculated photoelectron momentum distributions for parallel orientation…

Atomic Physics · Physics 2020-11-11 S. Wang , J. Y. Che , C. Chen , G. G. Xin , Y. J. Chen

The phenomenon of spatial (polar) asymmetry of produced photoelectron emission due to strong-field multiphoton process of above-threshold ionization (ATI) in atoms irradiated by a linearly polarized two-color (bichromatic) laser field…

Atomic Physics · Physics 2017-06-19 P. E. Pyak , E. A. Andreeva , V. I. Usachenko

We study single-photon ionization of aligned H$_2^+$ in low-intensity near-circular laser fields with lower photon energy numerically and analytically. The photoelectron momentum distribution (PMD) within the laser polarization plane,…

Atomic Physics · Physics 2025-05-13 Z. Y. Chen , S. Q. Shen , M. Q. Liu , J. Y. Che , Y. J. Chen

Attosecond dynamics in strong-field tunnel ionization are encoded in intricate holographic patterns in the photoelectron momentum distributions (PMDs). These patterns show the interference between two or more superposed quantum electron…

We study ionization dynamics of aligned diatomic molecules N$_2$ in strong elliptical laser fields experimentally and theoretically. The alignment dependence of photoelectron momentum distributions (PMDs) of N$_2$ measured in experiments is…

We revisit strong-field ionization of aligned O$_2$, CO$_2$, and CS$_2$ molecules in light of recent advances in the field of strong-field physics, in particular the inclusion of multielectron polarization in the numerical solution of the…

Atomic Physics · Physics 2022-08-17 M. Abu-samha , Lars Bojer Madsen

Tunneling ionization of an atom in ultrashort laser pulses is considered. When the driving laser pulse is switched-on and -off with a steep slope, the photoelectron momentum distribution (PMD) shows an edge-effect because of the…

Atomic Physics · Physics 2022-07-07 M. Klaiber , Q. Z. Lv , K. Z. Hatsagortsyan , C. H. Keitel

Photoelectron momentum distributions (PMDs) from atoms and molecules undergo qualitative changes as laser parameters are varied. We present a model to interpret the shape of the PMDs. The electron's motion is guided by a fictitious particle…

Chaotic Dynamics · Physics 2018-09-19 Jonathan Dubois , Simon Berman , Cristel Chandre , Turgay Uzer

We present a combined experimental and theoretical study on strong-field ionization of a three-dimensionally oriented asymmetric top molecule, benzonitrile (C$_7$H$_5$N), by circularly polarized, nonresonant femtosecond laser pulses. Prior…

We investigate the effects of the multielectron polarization of the ion described by the induced dipole potential in photoelectron momentum distributions produced in ionization of the CO molecule by a strong laser field. We present results…

Atomic Physics · Physics 2024-04-23 Mahmoud Abu-samha , L. B. Madsen , N. I. Shvetsov-Shilovski

Interaction of a strong laser pulse with matter transfers not only energy but also linear momentum of the photons. Recent experimental advances have made it possible to detect the small amount of linear momentum delivered to the…

Atomic Physics · Physics 2022-12-19 Xiaodan Mao , Hongcheng Ni , Xiaochun Gong , Joachim Burgdörfer , Jian Wu

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 common analysis in the strong field approximation is…

Atomic Physics · Physics 2022-04-06 Pei-Lun He , Michael Klaiber , Karen Z. Hatsagortsyan , Christoph H. Keitel

The full three-dimensional photoelectron momentum distributions of argon are measured in intense near-circularly polarized laser fields. We observed that the transverse momentum distribution of ejected electrons by 410-nm near-circularly…

Atomic Physics · Physics 2020-02-19 Xiang Huang , Qingbin Zhang , Shengliang Xu , Xianglong Fu , Xu Han , Wei Cao , Peixiang Lu

We present combined experimental and theoretical results on strong-field ionization of oriented carbonyl-sulphide molecules by circularly-polarized laser pulses. The obtained molecular frame photoelectron angular distributions show…

Strong-field photoelectron momentum imaging of the prototypical biomolecule indole was disentangled in a combined experimental and computational approach. Experimentally, strong control over the molecules enabled the acquisition of…

Atomic Physics · Physics 2021-02-03 Joss Wiese , Jolijn Onvlee , Sebastian Trippel , Jochen Küpper

Photoelectron angular distributions (PADs) of oriented polar molecules in response to different polarized lasers are systematically investigated. It is found that the PADs of polar CO molecules show three distinct styles excited by…

Chemical Physics · Physics 2013-03-05 Xiaosong Zhu , Qingbin Zhang , Weiyi Hong , Peixiang Lu , Zhizhan Xu

We report on strong field ionization of S- and R-propylene oxide in circularly polarized two-color laser fields. We find that the relative helicity of the two single color laser fields affects the photoelectron circular dichroism (PECD).…

We develop a novel method for strong-laser-field physics based on the combination of the semiclassical Herman-Kluk propagator and the strong-field approximation and demonstrate its high accuracy on the calculations of photoelectron momentum…

Atomic Physics · Physics 2024-08-26 Phi-Hung Tran , Van-Hung Hoang , Anh-Thu Le

The two-dimensional sub-cycle-time to electron momentum mapping provided by orthogonal two-color laser fields is applied to photoelectron spectroscopy. Using neon as the example we gain experimental access to the dynamics of emitted…

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