Spatial and temporal interference during the ionization of H by few-cycle XUV laser pulses

Borbély, S.; Tóth, Attila; Tőkési, K.; Nagy, L.

doi:10.1103/physreva.87.013405

Cited by 26 publications

(37 citation statements)

References 21 publications

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“…During these calculations, the target is not fully depleted, and as a result the recapture of the continuum electrons at the end of the pulse is not as pronounced as in the higher intensity case. Also, as we have seen in our pre- vious studies ( [6,7]) lower intensity means that the free wave packets gain smaller average velocities, thus reach smaller distances from the scattering center between consecutive redirections, which manifests in less detailed (e.g. fewer interference extrema) HM patterns.…”

Section: Resultssupporting

confidence: 57%

“…In our previous work [6,7] we have showed the existence of two distinct types (direct and scattered) of electron trajectories which contribute to the formation of the HM interference pattern, and we have investigated in details how the laser field parameters are influencing the shape of the HM pattern. Based on the results of [8] in our previous study [6] we have used a cosine-like laser pulse assuming that in this case the HM will be the dominant secondary process. In order to test this assumption, and to find the optimal conditions for the observation of the HM interference pattern, in the present work, we have performed several ab initio calculations on the ionization of the H atom by differently shaped few-cycle laser pulses.…”

Section: Introductionmentioning

confidence: 99%

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Ionization of atoms by few-cycle EUV laser pulses: carrier-envelope phase dependence of the intra-pulse interference effects

et al. 2014

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Abstract. We have investigated the ionization of the H atom by intense few-cycle laser pulses, in particular the intra-pulse interference effects, and their dependence on the carrier-envelope phase (CEP) of the laser pulse. In the final momentum distribution of the continuum electrons the imprint of two types of intrapulse interference effects can be observed, namely the temporal and spatial interference. During the spatial interference electronic wave packets emitted at the same time, but following different paths interfere leading to an interference pattern measurable in the electron spectra. This can be also interpreted as the interference between a direct and a scattered wave, and the spatial interference pattern as the holographic mapping (HM) of the target. This HM pattern is strongly influenced by the carrier-envelope phase through the shape of the laser pulse. Here, we have studied how the shape of the HM pattern is modified by the CEP, and we have found an optimal CEP for the observation of HM. PACS. PACS-key discribing text of that key -PACS-key discribing text of that key

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Section: Resultssupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Ionization of atoms by few-cycle EUV laser pulses: carrier-envelope phase dependence of the intra-pulse interference effects

et al. 2014

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“…This is one of the several possible EWP interference scenarios [5], and it is also known as spatial interference. In the case of spatial interference, along the different spatial paths each wave packet accumulates a different phase, which due to the coherent superposition leads to the formation of a radial ridge structure in the electron spectra [4][5][6][7][8][9][10][11][12][13][14]. In the framework of a simplified two-path model [4][5][6] the spatial interference pattern can be understood as the result of the interference between the direct (i.e., weakly scattered by the parent ion) and indirect (i.e., strongly scattered) EWPs.…”

Section: Introductionmentioning

confidence: 99%

Photoelectron holography of the H2+ molecule

et al. 2020

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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

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“…Waveform-controlled few-cycle laser pulses enabled the generation of isolated attosecond pulses in the extreme ultraviolet (EUV) spectral range and their application to the study of electron dynamics in atoms, molecules, and solids [3]. The observation of inner-atomic (strong-field) phenomena and EUV pump-EUV probe measurements require intense CEPcontrolled attosecond pulses [4][5][6]. EUV pump-EUV probe experiments can be carried out at free-electron lasers (FELs) [7,8]; however, the temporal resolution is limited to the few fs regime.…”

Section: Introductionmentioning

confidence: 99%

Carrier-Envelope-Phase Controlled Attosecond Pulse Generation by Undulator Radiation

et al. 2018

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Practical aspects of the robust method we proposed for producing few-cycle attosecond pulses with arbitrary waveform in the extreme ultraviolet spectral range are studied numerically. It is based on the undulator radiation of relativistic ultrathin electron layers produced by laser-driven energy modulation. By using realistic specifications, we show that isolated waveform-controlled extreme ultraviolet attosecond pulses at 5 nm with 10 nJ energy and 20 as pulse duration, at 20 nm with 90 nJ energy and 80 as pulse duration, and at 60 nm with 200 nJ energy and 240 as duration can be generated, respectively.

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Spatial and temporal interference during the ionization of H by few-cycle XUV laser pulses

Cited by 26 publications

References 21 publications

Ionization of atoms by few-cycle EUV laser pulses: carrier-envelope phase dependence of the intra-pulse interference effects

Ionization of atoms by few-cycle EUV laser pulses: carrier-envelope phase dependence of the intra-pulse interference effects

Photoelectron holography of the H2+ molecule

Carrier-Envelope-Phase Controlled Attosecond Pulse Generation by Undulator Radiation

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