General characterization of partially oriented polar molecules by the time-frequency profile of high-order harmonic generation

Phan, Ngoc-Loan; Nguyen, Kim-Ngan H.; Le, Cam-Tu; Vu, DinhDuy; Tran, Khang; Le, Van-Hoang

doi:10.1103/physreva.102.063104

Cited by 7 publications

(2 citation statements)

References 82 publications

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“…Due to the symmetry about the molecular axis (z axis) of the HOMO of CO, f (k , z, θ) = f (k , z). ψ( x 2 + y 2 , z) can be factored out in equation (10).…”

Section: D Reconstruction Methodsmentioning

confidence: 99%

“…When an intense laser field interacts with atoms or molecules, high-order harmonics are generated [1][2][3]. High-order harmonic generation (HHG) has a lot of applications in strongfield physics and ultrafast science, such as generating attosecond pulses [4][5][6], high spatial and temporal resolutions of atomic and molecular structures [7][8][9][10], and ultrafast dynamics [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Three-dimensional tomographic imaging of CO molecular orbitals reveals multi-electron effects

Ren¹,

Yang²,

Zhu³

et al. 2021

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

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According to the asymmetric molecular orbital reconstruction algorithm, which divides orbital into gerade and ungerade components and which does not depend on the unidirectional recollisional condition, we obtain the two-dimensional highest occupied molecular orbital (HOMO) of CO based on the directly calculated transition dipole moment and the harmonic spectra calculated by the Lewenstein model, respectively, which is the three-dimensional (3D) HOMO projected onto the plane perpendicular to the laser propagation direction. In order to retrieve the full orbital function, a 3D molecular orbital tomography (MOT) method is developed and is successfully applied to the reconstructions of the HOMO of CO, which simplifies the 3D imaging process of orbitals of linear molecules, and is expected to be extended to reconstruct the 3D orbitals of nonlinear molecules. In addition, the time-dependent density functional theory is employed to acquire the harmonic spectra of CO in a 800 nm and 1500 nm wavelength laser, respectively. The comparison of these two reconstruction results helps identify the multi-electron effects for asymmetric MOT, which requires further study. This work advances the development of MOT and is expected to reveal multi-electron effects in orbital imaging of complex polyatomic molecules.

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“…Due to the symmetry about the molecular axis (z axis) of the HOMO of CO, f (k , z, θ) = f (k , z). ψ( x 2 + y 2 , z) can be factored out in equation (10).…”

Section: D Reconstruction Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three-dimensional tomographic imaging of CO molecular orbitals reveals multi-electron effects

Ren¹,

Yang²,

Zhu³

et al. 2021

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

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Effect of multiple rescatterings on continuum harmonics from asymmetric molecules in multicycle lasers

Phan

et al. 2022

Phys. Chem. Chem. Phys.

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Probing orientation degrees of polar molecule from high-order harmonic generation: the case of partial alignment

Nguyen

Phan

et al. 2021

J. Phys.: Conf. Ser.

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Recently, we have proposed a general method to probe the whole range of degrees of orientation based on the time-frequency profile of high-order harmonic generation (HHG) but for perfectly aligned polar molecules only. In this study, we expand the previous results by considering the imperfect alignment of an ensemble of polar molecules. The “experimental” HHGs with molecular alignment distribution are simulated by numerically solving the time-dependent Schrödinger equation. The results show that, for high and moderate degrees of alignment, the proposed method is still effective and robust. For an ensemble with low degrees of alignment, the systematic error is significant due to the inaccuracy caused by the molecules aligned at large angles to the laser electric field.

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General characterization of partially oriented polar molecules by the time-frequency profile of high-order harmonic generation

Cited by 7 publications

References 82 publications

Three-dimensional tomographic imaging of CO molecular orbitals reveals multi-electron effects

Three-dimensional tomographic imaging of CO molecular orbitals reveals multi-electron effects

Effect of multiple rescatterings on continuum harmonics from asymmetric molecules in multicycle lasers

Probing orientation degrees of polar molecule from high-order harmonic generation: the case of partial alignment

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