Attosecond Pulse Trains Using High–Order Harmonics

Antoine, Philippe; L’Huillier, Anne; Lewenstein, Maciej

doi:10.1103/physrevlett.77.1234

Cited by 640 publications

(349 citation statements)

References 15 publications

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“…3). To isolate the spectrum originating from the long trajectories, macroscopic phase matching should be used to select the long trajectories by either changing the focusing conditions of the driving field [46] or by far-field separation [47] (see also the review [45] and references therein).…”

Section: Resultsmentioning

confidence: 99%

High-order-harmonic generation from field-distorted orbitals

2013

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We investigate the effect on high-order harmonic generation of the distortion of molecular orbitals by the driving laser field. Calculations for high-order harmonic generation including orbital distortion are performed for N2. Our results allow us to suggest that field-distortion is the reason why the two-center interference minimum has never been observed experimentally in N2. We propose experimental parameters which should allow an observation of the two-center interference minimum.

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Section: Resultsmentioning

confidence: 99%

High-order-harmonic generation from field-distorted orbitals

2013

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“…The temperature of the gas in the interaction region was estimated as ∼90 K, and the degree of molecular alignment was cos 2 θ ∼ 0.6. The gas jet was placed after the laser focus in order to select the short trajectory harmonics [20]. This selection, confirmed by the on-axis spatial distribution of the harmonic signal, is essential for the unambiguous mapping of electron excursion times onto photon energies.…”

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confidence: 99%

Revealing molecular structure and dynamics through high-order harmonic generation driven by mid-IR fields

et al. 2010

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“…1 we display the transition probabilities |M (ω)| 2 for a coherent superposition of the two dominant, shortest pair of orbits for increasing ellipticity. These orbits are well known in the literature as the "long orbit" and "short orbit" [56], and correspond to electron excursion times of the order of three quarters of a field cycle. We find that the suppressions in the spectra begin to weaken and that the alignment angle for which they appear in the spectrum changes.…”

Section: A Individual Prefactorsmentioning

confidence: 99%

Shifting nodal-plane suppressions in high-order-harmonic spectra from diatomic molecules in orthogonally polarized driving fields

Das¹,

Faria²

2016

Phys. Rev. A

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We analyze the imprint of nodal planes in high-order harmonic spectra from aligned diatomic molecules in intense laser fields whose components exhibit orthogonal polarizations. We show that the typical suppression in the spectra associated to nodal planes is distorted, and that this distortion can be employed to map the electron's angle of return to its parent ion. This investigation is performed semi-analytically at the single-molecule response and single-active orbital level, using the strong-field approximation and the steepest descent method. We show that the velocity form of the dipole operator is superior to the length form in providing information about this distortion. However, both forms introduce artifacts that are absent in the actual momentum-space wavefunction. Furthermore, elliptically polarized fields lead to larger distortions in comparison to two-color orthogonally polarized fields. These features are investigated in detail for O2, whose highest occupied molecular orbital provides two orthogonal nodal planes.

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Attosecond Pulse Trains Using High–Order Harmonics

Cited by 640 publications

References 15 publications

High-order-harmonic generation from field-distorted orbitals

High-order-harmonic generation from field-distorted orbitals

Revealing molecular structure and dynamics through high-order harmonic generation driven by mid-IR fields

Shifting nodal-plane suppressions in high-order-harmonic spectra from diatomic molecules in orthogonally polarized driving fields

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