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Chiral high-harmonic generation and spectroscopy on solid surfaces using polarization-tailored strong fields

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Kfir,  O.
Department of Ultrafast Dynamics, MPI for Biophysical Chemistry, Max Planck Society;

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Ropers,  C.       
Department of Ultrafast Dynamics, MPI for Biophysical Chemistry, Max Planck Society;

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Sivis,  M.
Department of Ultrafast Dynamics, MPI for Biophysical Chemistry, Max Planck Society;

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3373421.pdf
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2010.05558.pdf
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Citation

Heinrich, T., Taucer, M., Kfir, O., Corkum, P. B., Staudte, A., Ropers, C., et al. (2021). Chiral high-harmonic generation and spectroscopy on solid surfaces using polarization-tailored strong fields. Nature Communications, 12: 3723. doi:10.1038/s41467-021-23999-9.


Cite as: https://hdl.handle.net/21.11116/0000-000A-2367-B
Abstract
Strong-field methods in solids enable new strategies for ultrafast nonlinear spectroscopy and provide all-optical insights into the electronic properties of condensed matter in reciprocal and real space. Additionally, solid-state media offers unprecedented possibilities to control high-harmonic generation using modified targets or tailored excitation fields. Here we merge these important points and demonstrate circularly-polarized high-harmonic generation with polarization-matched excitation fields for spectroscopy of chiral electronic properties at surfaces. The sensitivity of our approach is demonstrated for structural helicity and termination-mediated ferromagnetic order at the surface of silicon-dioxide and magnesium oxide, respectively. Circularly polarized radiation emanating from a solid sample now allows to add basic symmetry properties as chirality to the arsenal of strong-field spectroscopy in solids. Together with its inherent temporal (femtosecond) resolution and non-resonant broadband spectrum, the polarization control of high harmonics from condensed matter can illuminate ultrafast and strong field dynamics of surfaces, buried layers or thin films.