Polaritons

Polaritons are hybrid particles made up of a photon strongly coupled to an electric dipole. Examples of such a dipole include an electron–hole pair in a semiconductor, which forms an exciton polariton, and the oscillating electrons at the surface of a metal, which creates a surface-plasmon polariton.

Latest Research and Reviews

  • Research |

    A polariton is a hybrid excitation resulting from strong light–matter coupling. The magneto-transport measurements have now revealed the crucial role played by its electronic component.

    • Gian L. Paravicini-Bagliani
    • , Felice Appugliese
    • , Eli Richter
    • , Federico Valmorra
    • , Janine Keller
    • , Mattias Beck
    • , Nicola Bartolo
    • , Clemens Rössler
    • , Thomas Ihn
    • , Klaus Ensslin
    • , Cristiano Ciuti
    • , Giacomo Scalari
    •  & Jérôme Faist
    Nature Physics 15, 186-190
  • Research | | open

    Here, the authors demonstrate that the dispersion of hyperbolic phonon polaritons can be controlled using the permittivity changes inherent in the different phases of phase change materials. This enables direct launching, reflection, transmission and refraction at the phase change material domain boundaries.

    • T. G. Folland
    • , A. Fali
    • , S. T. White
    • , J. R. Matson
    • , S. Liu
    • , N. A. Aghamiri
    • , J. H. Edgar
    • , R. F. Haglund Jr.
    • , Y. Abate
    •  & J. D. Caldwell
  • Research |

    A part-light, part-matter exciton-polariton topological insulator is created in an array of semiconductor microcavities.

    • S. Klembt
    • , T. H. Harder
    • , O. A. Egorov
    • , K. Winkler
    • , R. Ge
    • , M. A. Bandres
    • , M. Emmerling
    • , L. Worschech
    • , T. C. H. Liew
    • , M. Segev
    • , C. Schneider
    •  & S. Höfling
    Nature 562, 552-556
  • Research | | open

    Driven-dissipative microcavity polariton experiments find superfluid-like behaviour but the intuition developed from equilibrium systems cannot be straightforwardly applied. Juggins et al. show coherently-driven polaritons are not superfluid and earlier observations instead arise from a distinct rigid state.

    • R. T. Juggins
    • , J. Keeling
    •  & M. H. Szymańska

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