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We theoretically investigate the laser wavelength dependence of asymmetric dissociation of H$_2^+$. It is found that the electron localization in molecular dissociation is significantly manipulated by varying the wavelength of the driving…

原子与分子团簇 · 物理学 2015-06-03 Kunlong Liu , Weiyi Hong , Qingbin Zhang , Peixiang Lu

We investigate electron correlation effects in internuclear-distance-dependent enhanced ionization of $\mathrm{H}_2$, $\mathrm{LiH}$, and $\mathrm{HF}$ molecules by intense near-infrared laser pulses using a 3D description of the systems…

原子物理 · 物理学 2019-02-27 Siddhartha Chattopadhyay , Lars Bojer Madsen

We extend the semiclassical two-step model [Phys. Rev. A 94, 013415 (2016)] to include a multielectron polarization-induced dipole potential. Using this model we investigate the imprints of multielectron effects in the momentum…

原子物理 · 物理学 2018-08-22 N. I. Shvetsov-Shilovski , M. Lein , L. B. Madsen

We develop a time-dependent theory to investigate electron dynamics and photoionization processes of diatomic molecules interacting with strong laser fields including electron-electron correlation effects. We combine the recently formulated…

化学物理 · 物理学 2016-02-02 Henrik R. Larsson , Sebastian Bauch , Lasse Kragh Sørensen , Michael Bonitz

We consider atomic strong-field ionization in the long-pulse limit for linearly polarized infrared laser fields. We show how nondipole effects in the plane formed by the propagation and polarization directions lead to (i) a shift of the…

原子物理 · 物理学 2021-11-10 Mads Middelhede Lund , Lars Bojer Madsen

We present a theoretical study of the wave packet dynamics of the H$_2^+$ molecular ion in plasmon-enhanced laser fields. Such fields may be produced, for instance, when metallic nano-structures are illuminated by a laser pulse of moderated…

原子物理 · 物理学 2016-07-08 I. Yavuz , M. F. Ciappina , A. Chacón , Z. Altun , M. Lewenstein

In strong-field ionization interferences between electron trajectories create a variety of interference structures in the final momentum distributions. Among them, the interferences between electron pathways that are driven directly to the…

The electron localization in the dissociation of the asymmetric charged molecular ion HeH$^{2+}$ exposed to an intense few-cycle laser pulse is studied by solving numerically the 3D time-dependent Schr\"odinger equation. By varying the…

原子物理 · 物理学 2011-10-05 Kunlong Liu , Weiyi Hong , Peixiang Lu

Isotopic substitution in molecular systems can affect fundamental molecular properties including the energy position and spacing of electronic, vibrational and rotational levels, thus modifying the dynamics associated to their coherent…

Strong-field ionization of atoms by circularly polarized femtosecond laser pulses produces a donut-shaped electron momentum distribution. Within the dipole approximation this distribution is symmetric with respect to the polarization plane.…

We address the influence of the orbital symmetry and of the molecular alignment with respect to the laser-field polarization on laser-induced nonsequential double ionization of diatomic molecules, in the length and velocity gauges. We work…

原子物理 · 物理学 2009-11-13 C. Figueira de Morisson Faria , T. Shaaran , X. Liu , W. Yang

We present a detailed experimental and theoretical study on the relativistic non-dipole effects in strong-field atomic ionisation by near-infrared linearly-polarised few-cycle laser pulses in the intensity range 1014 -1015 W/cm2. We record…

In multi-electrode detectors, the motion of excess carriers generated by ionizing radiation induces charge pulses at the electrodes, whose intensities and polarities depend on the geometrical, electrostatic and carriers transport properties…

材料科学 · 物理学 2013-12-18 J. Forneris , V. Grilj , M. Jaksic , P. Olivero , F. Picollo , N. Skukan , C. Verona , G. Verona-Rinati , E. Vittone

We investigate the phase interference effects in the nonlinear Compton scattering via the collision between an high-energy electron and the laser in the intermediate intensity region, and reveal that the importance of interference effects…

高能物理 - 唯象学 · 物理学 2025-09-15 Zu-dong Zhao , Suo Tang

Ionization of atoms and molecules in laser fields can lead to various interesting interference structures in the photoelectron spectrum. For the case of a super-intense extreme ultraviolet laser pulse, we identify a novel petal-like…

原子物理 · 物理学 2022-03-29 Lei Geng , Hao Liang , K. Krajewska , Liang-You Peng , Qihuang Gong

We study nondipole effects in multiphoton ionization of a two-dimensional hydrogen-like atom by a flat-top laser pulse of varied intensity. For this purpose, we solve numerically a two-dimensional Schr\"odinger equation treating a…

原子物理 · 物理学 2024-12-25 J. Z. Kamiński , K. Krajewska

We study for a dielectric particle the effect of surplus electrons on the anomalous scattering of light arising from the transverse optical phonon resonance in the particle's dielectric constant. Excess electrons affect the polarizability…

等离子体物理 · 物理学 2015-06-05 R. L. Heinisch , F. X. Bronold , H. Fehske

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,…

原子物理 · 物理学 2025-05-13 Z. Y. Chen , S. Q. Shen , M. Q. Liu , J. Y. Che , Y. J. Chen

Diatomic molecules (e.g., O$_2$) in intense laser field exhibit a peculiar suppressed ionization behavior compared to their companion atoms. Several physical models have been proposed to account for this suppression while no consensus has…

原子物理 · 物理学 2011-11-15 Z. Lin , X. Y. Jia , C. Wang , Z. Hu , H. Kang , W. Quan , X. Y. Lai , X. Liu , J. Chen , B. Zeng , W. Chu , J. P. Yao , Y. Cheng , Z. Z. Xu

The single ionization of noble gas atoms by the combined action of XUV attopulses and an infrared laser field is theoretically investigated by means of a non-perturbative model that under certain approximations gives closed-form expressions…

原子物理 · 物理学 2015-12-21 D. I. R. Boll , O. A. Fojón
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