Setting the clock of photoelectron emission through molecular alignment

Trabattoni, A.; Trippel, S.; de Giovannini, U.; Olivieri, J. F.; Wiese, J.; Mullins, T.; Onvlee, J.; Son, S.-K.; Frusteri, B.; Rubio, A.; Küpper, J.

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Setting the clock of photoelectron emission through molecular alignment

MPS-Authors

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de Giovannini, U.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;

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Rubio, A.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Computational Quantum Physics (CCQ), The Flatiron Institute;
Department of Physics, Universität Hamburg;

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https://arxiv.org/abs/1802.06622
(Preprint)

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1802.06622.pdf
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Citation

Trabattoni, A., Trippel, S., de Giovannini, U., Olivieri, J. F., Wiese, J., Mullins, T., et al. (2018). Setting the clock of photoelectron emission through molecular alignment.

Cite as: https://hdl.handle.net/21.11116/0000-0001-B02B-8

Abstract

The interaction of strong laser fields with matter intrinsically provides powerful tools to image transient dynamics with an extremely high spatiotemporal resolution. In strong-field physics, the initial conditions of this interaction are generally considered a weak perturbation. We investigated strong-field ionisation of laser-aligned molecules and showed, for the first time, that the initial momentum acquired by the photoelectron at birth has a dramatic impact on the overall strong-field dynamics: It sets the clock for the emission of electrons with a given kinetic energy. This result represents a new benchmark for the seminal statements of strong-field physics, highlighting the crucial importance of the initial electron-emission conditions. Our findings have strong impact on the interpretation of self-diffraction experiments, where the photoelectron momentum distribution is used to retrieve molecular structures. Furthermore, the resulting encoding of the time-energy relation in molecular-frame photoelectron distributions provides a new way of probing the molecular potential with sub-femtosecond resolution and accessing a deeper understanding of electron tunnelling.