Momentum Distribution of Near-Zero-Energy Photoelectrons in the Strong-Field Tunneling Ionization in the Long Wavelength Limit

Xia, Qinzhi; Ye, D. F.; Fu, Libin; Xu, Han; Liu, J.

doi:10.1038/srep11473

Cited by 19 publications

(11 citation statements)

References 46 publications

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“…4 show the absence of LES. This agrees with the findings reported in [24], where it was shown that even a small screening parameter suppresses LES. Another feature manifest in Fig.…”

Section: Resultssupporting

confidence: 93%

“…An alternative mechanism, which may lead to the appearance of the low-energy electrons in the spectra, is the population trapping in the Rydberg states [22,24]. A useful insight into the role of this mechanism in our problem can be obtained by analyzing the distribution P (E,m), where E is electron energy, m the projection of the electron angular momentum on the z axis [we use here geometry encapsulated in Eq.…”

Section: Resultsmentioning

confidence: 99%

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Photoionization in the presence of circularly polarized fundamental and odd-order harmonic fields

2017

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We present a study of the photoelectron spectra for the ionization process driven by counterrotating and corotating circularly polarized fundamental and odd-order harmonic fields. The main features of the spectra, such as symmetric lobed structures, are understood using simple arguments based on the strong field approximation (SFA) picture of ionization. A deviation from this picture is, most notably, the presence of the low-energy structures (LES) in the spectra. We show that the Rydberg states populated as a result of the combined absorption of the photons from the fundamental and harmonic fields are responsible for the origin of LES.

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“…4 show the absence of LES. This agrees with the findings reported in [24], where it was shown that even a small screening parameter suppresses LES. Another feature manifest in Fig.…”

Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Photoionization in the presence of circularly polarized fundamental and odd-order harmonic fields

2017

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“…Coulomb focusing and the related caustic structures due to multiple recollisions of electrons [39][40][41] carry important information on the rescattering dynamics [42][43][44][45][46][47][48]. These dynamics have not been observed in experiments so far, because the rescattered electrons are embedded within a large background of direct photoelectrons.…”

Section: Introductionmentioning

confidence: 99%

Probing the ionization wave packet and recollision dynamics with an elliptically polarized strong laser field in the nondipole regime

et al. 2018

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We explore ionization and rescattering in strong mid-infrared laser fields in the nondipole regime over the full range of polarization ellipticity. In three-dimensional photoelectron momentum distributions (3D PMDs) measured with velocity map imaging spectroscopy, we observe the appearance of a sharp ridge structure along the major polarization axis. Within a certain range of ellipticity, the electrons in this ridge are clearly separated from the two lobes that commonly appear in the PMD with elliptically polarized laser fields. In contrast to the well-known lobes of direct electrons, the sharp ridge is created by Coulomb focusing of the softly recolliding electrons. These ridge electrons are directly related to a counterintuitive shift of the PMD peak opposite to the laser beam propagation direction when the dipole approximation breaks down. The ellipticity-dependent 3D PMDs give access to different ionization and recollision dynamics with appropriate filters in the momentum space. For example, we can extract information about the spread of the initial wave packet and the Coulomb momentum transfer of the rescattering electrons.

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“…The semi-classical calculations based on quantum orbit theory also confirm the influence of atomic potential on the rescattered electrons for the LES [43,44]. By comparing the forward-scattering from the Yukawa potential or the long-range Coulomb potential, the LES of photoelectrons is proven to be determined by the forward rescattering of electrons with the Coulomb long-range tail [45].…”

Section: Rescattering Process and The Joint Measurement Of Hatsmentioning

confidence: 63%

High-Harmonic and Terahertz Spectroscopy (HATS): Methods and Applications

et al. 2019

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Electrons driven from atom or molecule by intense dual-color laser fields can coherently radiate high harmonics from extreme ultraviolet to soft X-ray, as well as an intense terahertz (THz) wave from millimeter to sub-millimeter wavelength. The joint measurement of high-harmonic and terahertz spectroscopy (HATS) was established and further developed as a unique tool for monitoring electron dynamics of argon from picoseconds to attoseconds and for studying the molecular structures of nitrogen. More insights on the rescattering process could be gained by correlating the fast and slow electron motions via observing and manipulating the HATS from atoms and molecules. We also propose the potential investigations of HATS of polar molecules, and solid and liquid sources.

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Momentum Distribution of Near-Zero-Energy Photoelectrons in the Strong-Field Tunneling Ionization in the Long Wavelength Limit

Cited by 19 publications

References 46 publications

Photoionization in the presence of circularly polarized fundamental and odd-order harmonic fields

Photoionization in the presence of circularly polarized fundamental and odd-order harmonic fields

Probing the ionization wave packet and recollision dynamics with an elliptically polarized strong laser field in the nondipole regime

High-Harmonic and Terahertz Spectroscopy (HATS): Methods and Applications

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