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.

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  • News & Views |

    Giant exciton–polaritons come to the scene from a thin Cu2O crystal sandwiched by a microcavity. Their anticipated strong interactions may facilitate the development of a promising Rydberg solid-state platform for quantum technologies.

    • HeeBong Yang
    •  & Na Young Kim
    Nature Materials 21, 736-737
  • News & Views |

    Upon combining dissipative and nonlinear effects in a bipartite lattice of cavity polaritons, dissipatively stabilized bulk gap solitons emerge, which create a topological interface.

    • Flore K. Kunst
    Nature Physics 18, 609-610
  • News & Views |

    Polaritons are hybrid states of light and matter that occur in a wide range of physical platforms. When a nanosphere is levitated inside an optical cavity, light can hybridize with the motion on a plane rather than along an axis, resulting in ‘vectorial’ polaritons.

    • Tania S. Monteiro
    Nature Physics 17, 1084-1085
  • News & Views |

    Electromagnetic confinement in optical resonators of diminishing dimensions has enabled unprecedented light–matter interaction strengths. This miniaturization trend has a nonlocal limit, which, surprisingly, originates from the matter excitations rather than the light.

    • A. I. Fernández-Domínguez
    Nature Photonics 15, 640-641
  • News & Views |

    A new paradigm is emerging in which molecular properties are controlled by modifying the local electromagnetic environment, rather than the traditional approach of changing their composition or structure. Now, a tool to investigate such effects has been demonstrated that should accelerate progress in this exciting field.

    • Bill Barnes
    Nature Photonics 15, 169-170
  • News & Views |

    When a semiconductor is embedded inside a microcavity, infrared photons have been shown to bind electrons and holes together as excitons. This result opens the door for quantum material engineering based on light–matter interactions.

    • Meera M. Parish
    Nature Physics 17, 16-17