Resonant two-photon ionization of helium atoms studied by attosecond interferometry

L. Neoričić; D. Busto; H. Laurell; R. Weissenbilder; M. Ammitzböll; S. Luo; J. Peschel; H. Wikmark; J. Lahl; S. Maclot; R. J. Squibb; S. Zhong; P. Eng-Johnsson; C. L. Arnold; R. Feifel; M. Gisselbrecht; E. Lindroth; A. L’Huillier

doi:10.3389/fphy.2022.964586

Resonant two-photon ionization of helium atoms studied by attosecond interferometry

L. Neoričić, D. Busto, H. Laurell, R. Weissenbilder, M. Ammitzböll, S. Luo, J. Peschel, H. Wikmark, J. Lahl, S. Maclot, R. J. Squibb, S. Zhong, P. Eng-Johnsson, C. L. Arnold, R. Feifel, M. Gisselbrecht, E. Lindroth, A. L’Huillier

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Abstract

We study resonant two-photon ionization of helium atoms via the 1s3p, 1s4p and 1s5p¹P₁ states using the 15^th harmonic of a titanium-sapphire laser for the excitation and a weak fraction of the laser field for the ionization. The phase of the photoelectron wavepackets is measured by an attosecond interferometric technique, using the 17^th harmonic. We perform experiments with angular resolution using a velocity map imaging spectrometer and with high energy resolution using a magnetic bottle electron spectrometer. Our results are compared to calculations using the two-photon random phase approximation with exchange to account for electron correlation effects. We give an interpretation for the multiple π-rad phase jumps observed, both at and away from resonance, as well as their dependence on the emission angle.

Original language	English
Article number	964586
Journal	Frontiers in Physics
Volume	10
DOIs	https://doi.org/10.3389/fphy.2022.964586
Publication status	Published - 2022 Oct

Subject classification (UKÄ)

Atom and Molecular Physics and Optics

Keywords

attosecond
attosecond dynamics
photoelectron interferometry
photoionization
photoionization dynamics

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10.3389/fphy.2022.964586

Cite this

Neoričić, L., Busto, D., Laurell, H., Weissenbilder, R., Ammitzböll, M., Luo, S., Peschel, J., Wikmark, H., Lahl, J., Maclot, S., Squibb, R. J., Zhong, S., Eng-Johnsson, P., Arnold, C. L., Feifel, R., Gisselbrecht, M., Lindroth, E., & L’Huillier, A. (2022). Resonant two-photon ionization of helium atoms studied by attosecond interferometry. Frontiers in Physics, 10, [964586]. https://doi.org/10.3389/fphy.2022.964586

@article{7524f9130a784e6e85a214392cbd183b,

title = "Resonant two-photon ionization of helium atoms studied by attosecond interferometry",

abstract = "We study resonant two-photon ionization of helium atoms via the 1s3p, 1s4p and 1s5p1P1 states using the 15th harmonic of a titanium-sapphire laser for the excitation and a weak fraction of the laser field for the ionization. The phase of the photoelectron wavepackets is measured by an attosecond interferometric technique, using the 17th harmonic. We perform experiments with angular resolution using a velocity map imaging spectrometer and with high energy resolution using a magnetic bottle electron spectrometer. Our results are compared to calculations using the two-photon random phase approximation with exchange to account for electron correlation effects. We give an interpretation for the multiple π-rad phase jumps observed, both at and away from resonance, as well as their dependence on the emission angle.",

keywords = "attosecond, attosecond dynamics, photoelectron interferometry, photoionization, photoionization dynamics",

author = "L. Neori{\v c}i{\'c} and D. Busto and H. Laurell and R. Weissenbilder and M. Ammitzb{\"o}ll and S. Luo and J. Peschel and H. Wikmark and J. Lahl and S. Maclot and Squibb, {R. J.} and S. Zhong and P. Eng-Johnsson and Arnold, {C. L.} and R. Feifel and M. Gisselbrecht and E. Lindroth and A. L{\textquoteright}Huillier",

year = "2022",

month = oct,

doi = "10.3389/fphy.2022.964586",

language = "English",

volume = "10",

journal = "Frontiers in Physics",

issn = "2296-424X",

publisher = "Frontiers Media S. A.",

}

Neoričić, L, Busto, D , Laurell, H , Weissenbilder, R , Ammitzböll, M , Luo, S, Peschel, J, Wikmark, H, Lahl, J, Maclot, S, Squibb, RJ, Zhong, S, Eng-Johnsson, P , Arnold, CL, Feifel, R, Gisselbrecht, M, Lindroth, E & L’Huillier, A 2022, 'Resonant two-photon ionization of helium atoms studied by attosecond interferometry', Frontiers in Physics, vol. 10, 964586. https://doi.org/10.3389/fphy.2022.964586

TY - JOUR

T1 - Resonant two-photon ionization of helium atoms studied by attosecond interferometry

AU - Neoričić, L.

AU - Busto, D.

AU - Laurell, H.

AU - Weissenbilder, R.

AU - Ammitzböll, M.

AU - Luo, S.

AU - Peschel, J.

AU - Wikmark, H.

AU - Lahl, J.

AU - Maclot, S.

AU - Squibb, R. J.

AU - Zhong, S.

AU - Eng-Johnsson, P.

AU - Arnold, C. L.

AU - Feifel, R.

AU - Gisselbrecht, M.

AU - Lindroth, E.

AU - L’Huillier, A.

PY - 2022/10

Y1 - 2022/10

N2 - We study resonant two-photon ionization of helium atoms via the 1s3p, 1s4p and 1s5p1P1 states using the 15th harmonic of a titanium-sapphire laser for the excitation and a weak fraction of the laser field for the ionization. The phase of the photoelectron wavepackets is measured by an attosecond interferometric technique, using the 17th harmonic. We perform experiments with angular resolution using a velocity map imaging spectrometer and with high energy resolution using a magnetic bottle electron spectrometer. Our results are compared to calculations using the two-photon random phase approximation with exchange to account for electron correlation effects. We give an interpretation for the multiple π-rad phase jumps observed, both at and away from resonance, as well as their dependence on the emission angle.

AB - We study resonant two-photon ionization of helium atoms via the 1s3p, 1s4p and 1s5p1P1 states using the 15th harmonic of a titanium-sapphire laser for the excitation and a weak fraction of the laser field for the ionization. The phase of the photoelectron wavepackets is measured by an attosecond interferometric technique, using the 17th harmonic. We perform experiments with angular resolution using a velocity map imaging spectrometer and with high energy resolution using a magnetic bottle electron spectrometer. Our results are compared to calculations using the two-photon random phase approximation with exchange to account for electron correlation effects. We give an interpretation for the multiple π-rad phase jumps observed, both at and away from resonance, as well as their dependence on the emission angle.

KW - attosecond

KW - attosecond dynamics

KW - photoelectron interferometry

KW - photoionization

KW - photoionization dynamics

U2 - 10.3389/fphy.2022.964586

DO - 10.3389/fphy.2022.964586

M3 - Article

AN - SCOPUS:85140392761

VL - 10

JO - Frontiers in Physics

JF - Frontiers in Physics

SN - 2296-424X

M1 - 964586

ER -

Resonant two-photon ionization of helium atoms studied by attosecond interferometry

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