Anisotropy Parameters for Two-Color Photoionization Phases in Randomly Oriented Molecules: Theory and Experiment in Methane and Deuteromethane

Article

Anisotropy Parameters for Two-Color Photoionization Phases in Randomly Oriented Molecules: Theory and Experiment in Methane and Deuteromethane

Ertel, D.; Busto, D.; Makos, I.; Schmoll, M.; Benda, J.; Bragheri, R. O.; Lindroth, E.; Patchkovskii, S.; Mašín, Z.; Sansone, G.

J. Phys. Chem. A 128(9), 13 (2024)

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Abstract

We present combined theoretical and experimental work investigating the angle-resolved phases of the photoionization process driven by a two-color field consisting of an attosecond pulse train and an infrared pulse in an ensemble of randomly oriented molecules. We derive a general form for the two-color photoelectron (and time-delay) angular distribution valid also in the case of chiral molecules and when relative polarizations of the photons contributing to the attosecond photoelectron interferometer differ. We show a comparison between the experimental data and theoretical predictions in an ensemble of methane and deuteromethane molecules, discussing the effect of nuclear dynamics on the photoionization phases. Finally, we demonstrate that the oscillating component and the phase of the two-color signal can be fitted by using complex asymmetry parameters, in perfect analogy to the atomic case.

Institute authors

Supported by

GACR 20-15548Y — New mechanisms of damage of DNA driven by electrons and ultraviolet light
Primus/20/SCI/003 — New mechanisms of damage of DNA driven by electrons and ultraviolet light

BibTeX

@article{UTF956,
  author        = {Ertel, D. and Busto, D. and Makos, I. and Schmoll, M. and Benda, J. and Bragheri, R. O. and Lindroth, E. and Patchkovskii, S. and Mašín, Z. and Sansone, G.},
  title         = {{Anisotropy Parameters for Two-Color Photoionization Phases in Randomly Oriented Molecules: Theory and Experiment in Methane and Deuteromethane}},
  journal       = {J. Phys. Chem. A},
  volume        = {128},
  number        = {9},
  pages         = {13},
  year          = {2024},
  month         = {2},
  doi           = {10.1021/acs.jpca.3c06759},
  url           = {https://pubs.acs.org/doi/10.1021/acs.jpca.3c06759},
}