Molecular photoelectron interference effects by intense circularly polarized attosecond x-ray pulses

Yuan, Kai-Jun; Lu, Hui; Bandrauk, André D.

doi:10.1007/s11224-017-0964-5

Cited by 14 publications

(10 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A similar computational technique has been used to calculate emission characteristics in multiphoton double ionization of H 2 in circularly-polarized pulses [30]. Strong-field single-ionization of molecular ions in bichromatic, circularly-polarized pulses has also been studied [31][32][33], with a focus on HHG.…”

Section: Introductionmentioning

confidence: 99%

Electron rotational asymmetry in strong-field photodetachment from F− by circularly polarized laser pulses

Armstrong¹,

Clarke²,

Brown³

et al. 2019

Phys. Rev. A

View full text Add to dashboard Cite

We use the R-matrix with time-dependence method to study detachment from F − in circularlypolarized laser fields of infrared wavelength. By decomposing the photoelectron momentum distribution into separate contributions from detached 2p1 and 2p−1 electrons, we demonstrate that the detachment yield is distributed asymmetrically with respect to these initial orbitals. We observe the well-known preference for strong-field detachment of electrons that are initially counter-rotating relative to the field, and calculate the variation in this preference as a function of photoelectron energy. The wavelengths used in this work provide natural grounds for comparison between our calculations and the predictions of analytical approaches tailored for the strong-field regime. In particular, we compare the ratio of counter-rotating electrons to corotating electrons as a function of photoelectron energy. We carry out this comparison at two wavelengths, and observe good qualitative agreement between the analytical predictions and our numerical results. arXiv:1911.00290v1 [physics.atom-ph] 1 Nov 2019

show abstract

Section: Introductionmentioning

confidence: 99%

Electron rotational asymmetry in strong-field photodetachment from F− by circularly polarized laser pulses

Armstrong¹,

Clarke²,

Brown³

et al. 2019

Phys. Rev. A

View full text Add to dashboard Cite

show abstract

“…Nonetheless, obvious traces of the two-center interference [51][52][53] in the hologram of the H + 2 target are not observed at first sight. This might be due to the fact that the two dominant continuum electronic wave packets are created during the second and the third half cycle [10,13] of the driving laser pulse during a relatively large duration of time (compared to the laser field period).…”

Section: Resultsmentioning

confidence: 92%

Photoelectron holography of the H2+ molecule

et al. 2020

View full text Add to dashboard Cite

We investigate the photoelectron spectrum of the H2+ target induced by few-cycle XUV laser pulses using first principle calculations. In the photoelectron spectrum, by performing calculations for different internuclear separations, we investigate how the structure of the target is influencing the spatial interference pattern. This interference pattern is created by the coherent superposition of electronic wave packets emitted at the same time, but following different paths. We find that the location of the interference minima in the spectra is dominantly determined by the target’s ionization energy, however, by comparing the H2+ results with model calculations with spherically symmetric potentials, clear differences were observed for the molecular potential relative to the central potentials. Next to the main feature (spatial interference) we have also identified the traces of the two-center interference in the photoelectron spectrum, however, these were mainly washed out due to the complex electronic wave packet dynamics that occurs during the interaction with the considered laser field. Graphical abstract

show abstract

“…with ρ abs = 24 a.u., exceeding well the field induced electron oscillation α d = E 0 /ω 2 pu/pr of the electron. Molecular frame photoelectron distributions are calculated by a Fourier transform of the 3D time dependent electronic wavefunction ψ(ρ, θ, z, t), which exactly describe the electron dynamics in the continuum [55,56]:…”

Section: Methodsmentioning

confidence: 99%

Probing Attosecond Electron Coherence in Molecular Charge Migration by Ultrafast X-Ray Photoelectron Imaging

Yuan

Bandrauk

2019

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Electron coherence is a fundamental quantum phenomenon in today’s ultrafast physics and chemistry research. Based on attosecond pump–probe schemes, ultrafast X-ray photoelectron imaging of molecules was used to monitor the coherent electron dynamics which is created by an XUV pulse. We performed simulations on the molecular ion H 2 + by numerically solving time-dependent Schrödinger equations. It was found that the X-ray photoelectron angular and momentum distributions depend on the time delay between the XUV pump and soft X-ray probe pulses. Varying the polarization and helicity of the soft X-ray probe pulse gave rise to a modulation of the time-resolved photoelectron distributions. The present results provide a new approach for exploring ultrafast coherent electron dynamics and charge migration in reactions of molecules on the attosecond time scale.

show abstract

Molecular photoelectron interference effects by intense circularly polarized attosecond x-ray pulses

Cited by 14 publications

References 77 publications

Electron rotational asymmetry in strong-field photodetachment from F− by circularly polarized laser pulses

Electron rotational asymmetry in strong-field photodetachment from F− by circularly polarized laser pulses

Photoelectron holography of the H2+ molecule

Probing Attosecond Electron Coherence in Molecular Charge Migration by Ultrafast X-Ray Photoelectron Imaging

Contact Info

Product

Resources

About