Experimental characterization of nonlocal photon fluids

David Vocke, Thomas Roger, Francesco Marino, Ewan M Wright, Iacopo Carusotto, Matteo Clerici, Daniele Faccio

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Quantum gases of atoms and exciton-polaritons are now well-established theoretical and experimental tools for fundamental studies of quantum many-body physics and suggest promising applications to quantum computing. Given their technological complexity, it is of paramount interest to devise other systems where such quantum many-body physics can be investigated at lesser technological expense. Here we examine a relatively well-known system of laser light propagating through thermo-optical defocusing media: based on a hydrodynamic description of light as a quantum fluid of interacting photons, we investigate such systems as a valid room-temperature alternative to atomic or exciton–polariton condensates for studies of many-body physics. First, we show that by using a technique traditionally used in oceanography it is possible to perform a direct measurement of the single-particle part of the dispersion relation of the elementary excitations on top of the photon fluid and to detect its global flow. Then, using a pump-and-probe setup, we investigate the dispersion of excitation modes of the fluid: for very long wavelengths, a sonic, dispersionless propagation is observed that we interpret as a signature of superfluid behavior.

Original languageEnglish (US)
Pages (from-to)484-490
Number of pages7
JournalOptica
Volume2
Issue number5
DOIs
StatePublished - 2015

Fingerprint

Photons
Physics
physics
Fluids
fluids
photons
oceanography
Oceanography
defocusing
elementary excitations
quantum computation
Excitons
polaritons
condensates
Hydrodynamics
Gases
hydrodynamics
excitons
signatures
Pumps

Keywords

  • Kerr effect
  • Nonlinear optics, Materials
  • Photothermal effects

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials

Cite this

Vocke, D., Roger, T., Marino, F., Wright, E. M., Carusotto, I., Clerici, M., & Faccio, D. (2015). Experimental characterization of nonlocal photon fluids. Optica, 2(5), 484-490. https://doi.org/10.1364/OPTICA.2.000484

Experimental characterization of nonlocal photon fluids. / Vocke, David; Roger, Thomas; Marino, Francesco; Wright, Ewan M; Carusotto, Iacopo; Clerici, Matteo; Faccio, Daniele.

In: Optica, Vol. 2, No. 5, 2015, p. 484-490.

Research output: Contribution to journalArticle

Vocke, D, Roger, T, Marino, F, Wright, EM, Carusotto, I, Clerici, M & Faccio, D 2015, 'Experimental characterization of nonlocal photon fluids', Optica, vol. 2, no. 5, pp. 484-490. https://doi.org/10.1364/OPTICA.2.000484
Vocke D, Roger T, Marino F, Wright EM, Carusotto I, Clerici M et al. Experimental characterization of nonlocal photon fluids. Optica. 2015;2(5):484-490. https://doi.org/10.1364/OPTICA.2.000484
Vocke, David ; Roger, Thomas ; Marino, Francesco ; Wright, Ewan M ; Carusotto, Iacopo ; Clerici, Matteo ; Faccio, Daniele. / Experimental characterization of nonlocal photon fluids. In: Optica. 2015 ; Vol. 2, No. 5. pp. 484-490.
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