Terahertz displacive excitation of a coherent Raman-active phonon in V2O3
| Autor: | Giorgianni, Flavio, Udina, Mattia, Cea, Tommaso, Paris, Eugenio, Caputo, Marco, Radovic, Milan, Boie, Larissa, Sakai, Joe, Schneider, Christof W., Johnson, Steven Lee |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
DYNAMICS
PHASE DECP FOS: Physical sciences V2O3 Condensed Matter - Strongly Correlated Electrons THz pump-probe Frequency mixing Raman-active phonon SPECTROSCOPY Strongly Correlated Electrons (cond-mat.str-el) Light fields Coherent phonons Collective modes DRIVEN PULSE Nonlinear process Coherent spectroscopies THz pump-probe DECP V2O3 Phonon mode LIGHT-INDUCED SUPERCONDUCTIVITY Condensed Matter::Strongly Correlated Electrons Tera Hertz Ultra-fast TRANSITION |
| Zdroj: | Communications Physics, 5 Repositorio Institucional del Instituto Madrileño de Estudios Avanzados en Nanociencia instname Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona Communications physics 5 (2022): 103-1–103-7. doi:10.1038/s42005-022-00882-7 info:cnr-pdr/source/autori:Giorgianni, Flavio; Udina, Mattia; Cea, Tommaso; Paris, Eugenio; Caputo, Marco; Radovic, Milan; Boie, Larissa; Sakai, Joe; Schneider, Christof W.; Johnson, Steven Lee/titolo:Terahertz displacive excitation of a coherent Raman-active phonon in V2O3/doi:10.1038%2Fs42005-022-00882-7/rivista:Communications physics/anno:2022/pagina_da:103-1/pagina_a:103-7/intervallo_pagine:103-1–103-7/volume:5 |
| DOI: | 10.1038/s42005-022-00882-7 |
| Popis: | 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 V2O3. Our results show an alternative up-conversion pathway for the optical control of Raman-active modes in solids mediated by terahertz-driven electronic excitation. Communications Physics, 5 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|