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Conferences > CLEO_FS > 2023 > FTh5B > FTh5B.5

Nonperturbative carrier generation and symmetry reduction in bismuth by intense terahertz excitation

Matthias Runge, Ahmed Ghalgaoui, Isabel Gonzalez-Vallejo, Fabian Thiemann, Michael Horn-von Hoegen, Klaus Reimann, Michael Woerner, and Thomas Elsaesser

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Abstract

The semimetal bismuth is studied by two-dimensional terahertz (2D-THz) spectroscopy in the nonperturbative regime. We observe and separate different components of the nonlinear THz response, including high harmonic generation and pump-probe signals pointing to anisotropic transient carrier distributions and phonon backfolding at reduced symmetry.

© 2023 The Author(s)

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