Influence of the alignment angle of molecules on the cutoff of the high-order harmonics

Wang, Bo-Yang; Wu, Yan; Zhao, Song-Feng

doi:10.1016/j.ijleo.2018.11.056

Cited by 2 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The harmonic phase has been theoretically investigated to illustrate the cutoff regime of HHG which can be characterized by the same dephasing between the adjacent harmonics [14]. The effect of the alignment angle on cutoff position has also been demonstrated and the results show that the influence is due to the no uniform electron distributions [15]. Based on the Bessel functions and the Einstein photoelectric law, there two different coefficients are given by the nonperturbative quantum electrodynamics theory which better illustrate the cutoff law from the physical mechanism [16].…”

Section: Introductionmentioning

confidence: 99%

Influence of intensity ratio of the two driving laser fields on the cutoff of the high-order harmonics

Zhang¹,

Huo²,

Guo³

et al. 2020

Laser Phys.

View full text Add to dashboard Cite

We investigate the high-order harmonic generation (HHG) of the helium atom at the various intensity ratios of the counter-rotating two-color circularly polarized laser fields. The results show that the cutoff energy of the harmonic spectra can be affected by changing the intensity ratios. By comparing the results from different intensity ratios, we find that the distances the electrons travel are short when the intensity ratio is increased. The dependence of the cutoff position in the HHG on the intensity ratios usually results from the classical trajectories of the electrons. As the intensity ratio increases, the electrons cannot be accelerated and it will gain less energy. As a result, the harmonic spectra are cut off at the lower energy. We compare the quantum and classical trajectories results to illustrate the reasons of the cut off dependence.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of intensity ratio of the two driving laser fields on the cutoff of the high-order harmonics

Zhang¹,

Huo²,

Guo³

et al. 2020

Laser Phys.

View full text Add to dashboard Cite

show abstract

Comparative study of electron vortices in photoionization of molecules and atoms by counter-rotating circularly polarized laser pulses

Wang

Wen

et al. 2023

J. Opt. Soc. Am. B

View full text Add to dashboard Cite

We comparatively study the effect of orbital symmetry on vortex patterns in photoelectron momentum distributions (PMDs) of perfectly aligned H2 and N2 molecules and their companion atom Ar exposed to a pair of delayed counter-rotating circularly polarized lasers by numerically solving the two-dimensional time-dependent Schrödinger equation. We show that vortex patterns in PMDs strongly depend on the orbital symmetry of atoms and molecules, and numbers of spiral arms in PMDs of N2, H2, and Ar are quite different even though they have nearly identical ionization potentials. We also confirm that vortex structures in PMDs of the highest occupied molecular orbit (HOMO)-2 for N2 are quite different from those of the HOMO but similar to those of Ar. Furthermore, vortex patterns in PMDs of molecules are also sensitive to internuclear distances and alignment angles, which provides more possibilities for controlling the coherent interference of electronic wave packets in comparison with atoms.

show abstract

Influence of the alignment angle of molecules on the cutoff of the high-order harmonics

Cited by 2 publications

References 21 publications

Influence of intensity ratio of the two driving laser fields on the cutoff of the high-order harmonics

Influence of intensity ratio of the two driving laser fields on the cutoff of the high-order harmonics

Comparative study of electron vortices in photoionization of molecules and atoms by counter-rotating circularly polarized laser pulses

Contact Info

Product

Resources

About