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Journal Article

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

MPS-Authors
/persons/resource/persons281316

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

/persons/resource/persons22028

Rubio,  A.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;
Center for Computational Quantum Physics, Flatiron Institute;

/persons/resource/persons261477

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

External Resource

https://doi.org/10.1021/acs.jpclett.3c02936
(Publisher version)

https://arxiv.org/abs/2303.15055
(Preprint)

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Fulltext (public)
Supplementary Material (public)

jz3c02936_si_001.pdf
(Supplementary material), 3MB

Citation

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.


Cite as: https://hdl.handle.net/21.11116/0000-000E-074C-6
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.