Generation of Single Attosecond Pulse by Using Asymmetric Polarization Gating Technology

Liu, H.; Castle, R. S.; Feng, A. Yuanzi

doi:10.1007/s10812-019-00909-y

Cited by 1 publication

(1 citation statement)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, solving the time-dependent Schrödinger equation for the molecular ion H + 2 , in [59] it was shown that it is possible to produce a single circularly polarized attosecond pulse using a few-cycle elliptically polarized laser pulse combined with a terahertz field. More recently, generation of a single attosecond pulse with the help of the asymmetric polarization-gating technique was analyzed [60], as well as with three-color electric fields [61]. Also, in [62] the influence of the time and space inhomogeneities of the laser field on the HHG spectra and the attosecond pulses was investigated, while in [63] a method to produce circularly polarized attosecond pulses with tunable helicity from a CO molecule was proposed.…”

Section: Introductionmentioning

confidence: 99%

High-order harmonic generation by planar polyatomic molecules exposed to an orthogonally polarized two-color laser field

Habibović¹,

Becker²,

Milošević³

2021

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

View full text Add to dashboard Cite

The molecular strong-field approximation is employed to study high-order harmonic generation by linear and planar polyatomic molecules exposed to an orthogonally polarized two-color laser field, which consists of two orthogonal linearly polarized components with commensurable frequencies. For such a driving field, we find that the harmonic emission rate and the shape of the spectrum strongly depend on the laser-field parameters including the relative phase and the ratio of the intensities of the two components. The values of the relative phase that correspond to the optimal harmonic emission rate, as well as the cutoff position, can be assessed using a classical model. The possible production of an isolated attosecond pulse is investigated. For suitable symmetry of the laser field an attosecond pulse train with only one attosecond pulse per cycle can be generated. Depending on the frequencies of the two field components, the molecular symmetry properties and the orientation of the molecule with respect to the field, the even harmonics can be absent from the spectrum, which can be used to determine the molecular orientation. The emitted harmonics are elliptically polarized and their ellipticity depends on the molecular orientation.

show abstract