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  Mapping Light-Dressed Floquet Bands by Highly Nonlinear Optical Excitations and Valley Polarization

Galler, A., Rubio, A., & Neufeld, O. (2023). Mapping Light-Dressed Floquet Bands by Highly Nonlinear Optical Excitations and Valley Polarization. The Journal of Physical Chemistry Letters, 14(50), 11298-11304. doi:10.1021/acs.jpclett.3c02936.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000E-074C-6 Version Permalink: https://hdl.handle.net/21.11116/0000-000E-164C-5
Genre: Journal Article

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Supporting Information: Technical details concerning the model and TDDFT calculations and additional results for several field strengths, frequencies, and pulse lengths
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© The Authors. Published by American Chemical Society
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 Creators:
Galler, A.1, 2, Author           
Rubio, A.1, 2, 3, Author           
Neufeld, O.1, 2, Author           
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Center for Free-Electron Laser Science, ou_persistent22              
3Center for Computational Quantum Physics, Flatiron Institute, ou_persistent22              

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 Abstract: Ultrafast nonlinear optical phenomena in solids have been attracting a great deal of interest as novel methodologies for the femtosecond spectroscopy of electron dynamics and control of the properties of materials. Here, we theoretically investigate strong-field nonlinear optical transitions in a prototypical two-dimensional material, hBN, and show that the k-resolved conduction band charge occupation patterns induced by an elliptically polarized laser can be understood in a multiphoton resonant picture, but, remarkably, only if using the Floquet light-dressed states instead of the undressed matter states. Our work demonstrates that Floquet dressing affects ultrafast charge dynamics and photoexcitation even from a single pump pulse and establishes a direct measurable signature for band dressing in nonlinear optical processes in solids, opening new paths for ultrafast spectroscopy and valley manipulation.

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Language(s): eng - English
 Dates: 2023-12-012023-10-202023-12-042023-12-21
 Publication Status: Published online
 Pages: 7
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jpclett.3c02936
arXiv: 2303.15055
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Project name : The authors thank Massimo Altarelli, Andrey Geondzhian, Wenwen Mao, and Shunsuke Sato for helpful discussions. This work was supported by the Cluster of Excellence Advanced Imaging of Matter (AIM) - EXC 2056 (Project 390715994), SFB-925 “Light induced dynamics and control of correlated quantum systems” (Project 170620586) of the Deutsche Forschungsgemeinschaft (DFG), Grupos Consolidados (IT1453-22), and the Max Planck-New York City Center for Non-Equilibrium Quantum Phenomena. The Flatiron Institute is a division of the Simons Foundation. O.N. gratefully acknowledges the generous support of a Schmidt Science Fellowship. Open access funded by Max Planck Society.
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Title: The Journal of Physical Chemistry Letters
  Abbreviation : J. Phys. Chem. Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 14 (50) Sequence Number: - Start / End Page: 11298 - 11304 Identifier: ISSN: 1948-7185
CoNE: https://pure.mpg.de/cone/journals/resource/1948-7185