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Título: | Terahertz displacive excitation of a coherent Raman-active phonon in V2O3 |
Autor: | Giorgianni, Flavio; Udina, Mireia; Cea, Tommaso; Caputo, Marco; Radovic, M.; Boie, Larissa; Sakai, Joe; Schneider, Christof W.; Johnson, Steven | Palabras clave: | Electronic properties and materials Optical spectroscopy |
Fecha de publicación: | 28-abr-2022 | Editor: | Nature Publishing Group | Citación: | Communications Physics 5: 103 (2022) | Resumen: | Nonlinear processes involving frequency-mixing of light fields set the basis for ultrafast coherent spectroscopy of collective modes in solids. In certain semimetals and semiconductors, generation of coherent phonon modes can occur by a displacive force on the lattice at the difference-frequency mixing of a laser pulse excitation on the electronic system. Here, as a low-frequency counterpart of this process, we demonstrate that coherent phonon excitations can be induced by the sum-frequency components of an intense terahertz light field, coupled to intraband electronic transitions. This nonlinear process leads to charge-coupled coherent dynamics of Raman-active phonon modes in the strongly correlated metal VO. Our results show an alternative up-conversion pathway for the optical control of Raman-active modes in solids mediated by terahertz-driven electronic excitation. | Versión del editor: | http://doi.org/10.1038/s42005-022-00882-7 | URI: | http://hdl.handle.net/10261/279066 | DOI: | 10.1038/s42005-022-00882-7 | Identificadores: | doi: 10.1038/s42005-022-00882-7 issn: 2399-3650 |
Aparece en las colecciones: | (CIN2) Artículos |
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Terahertz_displacive_excitation.pdf | 1,29 MB | Adobe PDF | Visualizar/Abrir |
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