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.

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  • News and Views |

    Josephson vortices are observed at the boundary between two exciton-polariton condensates, with lasers used to create the required local phase twist. The finding opens new opportunities for exploring fundamental physics and engineering novel quantum devices.

    • Taehyun Yoon
    •  & Na Young Kim
    Nature Photonics 13, 441-442
  • News and Views |

    Organic microcavity optical transistors open up opportunities for real-world optical switching at room temperature. Now, an all-optical switch at room temperature, using an organic exciton medium with high quantum yield, brings us a step closer to all-optical logical networks.

    • Zheng Sun
    •  & David W. Snoke
    Nature Photonics 13, 370-371
  • News and Views |

    A hybrid state of photons and electronic excitations in semiconductor quantum wells shows nonlinear behaviour at the level of single or few quanta, thus opening the door to the realization of photonic nonlinear quantum devices employing semiconductor technologies.

    • Dario Gerace
    • , Fabrice Laussy
    •  & Daniele Sanvitto
    Nature Materials 18, 200-201