Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session Y33: Quantum Photonics and Nonlinear Optics III
8:00 AM–10:48 AM,
Friday, March 18, 2022
Room: McCormick Place W-192C
Sponsoring
Unit:
DAMOP
Chair: Guilherme L Zanin, University of Vienna
Abstract: Y33.00006 : Bragg spectroscopy of a quantum fluid of polaritons*
9:00 AM–9:12 AM
Presenter:
Ferdinand Claude
(Société Française de Physique)
Authors:
Ferdinand Claude
(Société Française de Physique)
Maxime J Jacquet
(Laboratoire Kastler Brossel)
Romain Usciati
(Center and Dipartimento di Fisica, Universita di Trento)
Iacopo Carusotto
(Center and Dipartimento di Fisica, Universita di Trento)
Elisabeth Giacobino
(Laboratoire Kastler Brossel)
Alberto Bramati
(Laboratoire Kastler Brossel)
Quentin Glorieux
(Laboratoire Kastler Brossel)
Like ultracold atomic condensates or liquid helium, polariton fluids support on their surface a set of collective excitations, the Bogoliubov modes, which are responsible for the emergence of macroscopic coherence phenomenons, such as superfluidity.
We show here a new experimental Bragg spectroscopy method allowing to exhaustively characterize the Bogoliubov relation dispersion of a coherently driven fluid of light in different regimes. The high spectral resolution of this technique allows us to accurately measure the speed of sound of polaritons and to observe the appearance of localized unstable modes. Finally, thanks to its high sensitivity, we can successfully reveal elusive spectral modes, such as the polariton ghost branch.
*Project PhoQuS
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