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Cited by 36Strong Light-Matter InteractionsPlasmonic and Surface Plasmon ResearchLaser-Matter Interactions and Applications

High-Resolution Coherent Probe Spectroscopy of a Polariton Quantum Fluid

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Claude, F., Jacquet, M. J., Usciati, R., Carusotto, I., Giacobino, E., Bramati, A., Glorieux, Q.·2022·Physical Review Letters
DOI 10.1103/physrevlett.129.103601
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Abstract

Characterizing elementary excitations in quantum fluids is essential to study their collective effects. We present an original angle-resolved coherent probe spectroscopy technique to study the dispersion of these excitation modes in a fluid of polaritons under resonant pumping. Thanks to the unprecedented spectral and spatial resolution, we observe directly the low-energy phononic behavior and detect the negative-energy modes, i.e., the ghost branch, of the dispersion relation. In addition, we reveal narrow spectral features precursory of dynamical instabilities due to the intrinsic out-of-equilibrium nature of the system. This technique provides the missing tool for the quantitative study of quantum hydrodynamics in polariton fluids.

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Authors
Claude, F., Jacquet, M. J., Usciati, R., Carusotto, I., Giacobino, E., Bramati, A., & Glorieux, Q.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • University of Trento (IT)
ORCID
Venue
Physical Review Letters
Publisher
American Physical Society (APS)
Published
2022-08-29
Volume
129
Issue
10
Pages
103601-103601
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
DOI
10.1103/physrevlett.129.103601
OpenAlex
W4226437082
Cited by
36
References
0
Citations by year
2026: 5 · 2025: 7 · 2024: 7 · 2023: 10 · 2022: 7
FWCI
3.18
Type
journal article
Language
en
Open access
Licence
link.aps.org/licenses/aps-default-license (vor)
Locations
  • Physical Review Letters (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • HAL (submittedVersion, other-oa)
  • arXiv (Cornell University)
Funders
  • H2020 European Research Council (820392)
  • Provincia Autonoma di Trento
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Strong Light-Matter Interactions
  • Physical Sciences › Engineering › Biomedical Engineering › Plasmonic and Surface Plasmon Research
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
Keywords
exciton-polaritons, angle-resolved spectroscopy, dispersion relation, negative energy modes, dynamical instability, quantum hydrodynamics, collective excitations, resonant pumping

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