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Journal Article

Photoelectron spectroscopy of laser-dressed atomic helium

MPS-Authors
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Schnorr,  Kirsten
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Lindenblatt,  Hannes Carsten
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Pfeifer,  Thomas
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Moshammer,  Robert
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Citation

Meister, S., Bondy, A., Schnorr, K., Augustin, S., Lindenblatt, H. C., Trost, F., et al. (2020). Photoelectron spectroscopy of laser-dressed atomic helium. Physical Review A, 102(6): 062809. doi:10.1103/PhysRevA.102.062809.


Cite as: https://hdl.handle.net/21.11116/0000-0008-2988-1
Abstract
Photoelectron emission from excited states of laser-dressed atomic helium is analyzed with respect to laser intensity-dependent excitation energy shifts and angular distributions. In the two-color exteme ultraviolet (XUV)-infrared (IR) measurement, the XUV photon energy is scanned between 20.4 eV and the ionization threshold at 24.6 eV, revealing electric dipole-forbidden transitions for a temporally overlapping IR pulse (approximate to 10(12) W cm(-2)). The interpretation of the experimental results is supported by numerically solving the timedependent Schrodinger equation in a single-active-electron approximation.