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  Controlling Floquet states on ultrashort time scales

Lucchini, M., Medeghini, F., Wu, Y., Vismarra, F., Borrego-Varillas, R., Crego, A., et al. (2022). Controlling Floquet states on ultrashort time scales.

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2205.00788.pdf (Preprint), 667KB
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https://arxiv.org/abs/2205.00788 (Preprint)
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 Creators:
Lucchini, M.1, 2, Author
Medeghini, F.1, Author
Wu, Y.1, 2, Author
Vismarra, F.1, 2, Author
Borrego-Varillas, R.2, Author
Crego, A.2, Author
Frassetto, F.2, Author
Poletto, L.2, Author
Sato, S.3, 4, Author              
Hübener, H.4, 5, Author              
de Giovannini, U.4, 5, Author              
Rubio, A.4, 6, Author              
Nisoli, M.1, 2, Author
Affiliations:
1Department of Physics, Politecnico di Milano, ou_persistent22              
2Institute for Photonics and Nanotechnologies, IFN-CNR, ou_persistent22              
3Center for Computational Sciences, University of Tsukuba, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
5Università degli Studi di Palermo, Dipartimento di Fisica e Chimica-Emilio Segrè, ou_persistent22              
6Center for Computational Quantum Physics (CCQ), The Flatiron Institute, ou_persistent22              

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Free keywords: Physics, Optics, physics.optics,physics.app-ph
 Abstract: The advent of ultrafast laser science offers the unique opportunity to combine Floquet engineering with extreme time resolution, further pushing the optical control of matter into the petahertz domain. However, what is the shortest driving pulse for which Floquet states can be realised remains an unsolved matter, thus limiting the application of Floquet theory to pulses composed by many optical cycles. Here we ionized Ne atoms with few-femtosecond pulses of selected time duration and show that a Floquet state can be established already within 10 cycles of the driving field. For shorter pulses, down to 2 cycles, the finite lifetime of the driven state can still be explained using an analytical model based on Floquet theory. By demonstrating that the population of the Floquet sidebands can be controlled not only with the driving laser pulse intensity and frequency, but also by its duration, our results add a new lever to the toolbox of Floquet engineering.

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Language(s): eng - English
 Dates: 2022-05-02
 Publication Status: Published online
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: arXiv: 2205.00788
 Degree: -

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