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
    | Open Access

    Recent spectroscopic studies have elucidated light-matter interactions in exciton-polaritons at room temperature, yet their precise excited-state dynamics remain unclear. Here, broadband 2D Fourier transform spectroscopy reveals the relaxation between polaritonic states and the role of dark states.

    • Lars Mewes
    • , Mao Wang
    • , Rebecca A. Ingle
    • , Karl Börjesson
    •  & Majed Chergui
  • Research
    | Open Access

    Efficient generation of phonons is an important ingredient for a prospective electrically-driven phonon laser for coherent control of quantum systems. Here, the authors report on laser-like phonon emission in a hybrid semiconductor microcavity that optomechanically couples BEC polaritons with phonons.

    • D. L. Chafatinos
    • , A. S. Kuznetsov
    • , S. Anguiano
    • , A. E. Bruchhausen
    • , A. A. Reynoso
    • , K. Biermann
    • , P. V. Santos
    •  & A. Fainstein
  • Research
    | Open Access

    To simulate band structures of solid state materials synthetic lattices are usually generated by optical lattices or by irreversible patterning the system. Here, the authors present reconfigurable synthetic band-structures in optical exciton-polariton lattices and generate non-Hermitian topological phases.

    • L. Pickup
    • , H. Sigurdsson
    • , J. Ruostekoski
    •  & P. G. Lagoudakis
  • Research
    | Open Access

    Structures that can enhance the capabilities of quantum cascade lasers are highly sought after to improve their practicality for a range of applications. Here the authors demonstrate such a structure in a saturable absorber that takes advantage of intersubband polaritons in the terahertz range and study coherent nonlinear dynamics in the system.

    • Jürgen Raab
    • , Francesco P. Mezzapesa
    • , Leonardo Viti
    • , Nils Dessmann
    • , Laura K. Diebel
    • , Lianhe Li
    • , A. Giles Davies
    • , Edmund H. Linfield
    • , Christoph Lange
    • , Rupert Huber
    •  & Miriam S. Vitiello
  • Research
    | Open Access

    Direct visualization of moiré superlattices in van der Waals heterostructures is a needed diagnostic tool for the study of periodicity-induced electronic and optical phenomena. Here, the authors demonstrate that the moiré pattern in twisted bilayer graphene can be indirectly imaged by imaging the phonon polariton interference on the top hexagonal boron nitride encapsulation layer.

    • Yue Luo
    • , Rebecca Engelke
    • , Marios Mattheakis
    • , Michele Tamagnone
    • , Stephen Carr
    • , Kenji Watanabe
    • , Takashi Taniguchi
    • , Efthimios Kaxiras
    • , Philip Kim
    •  & William L. Wilson

News and Comment

  • News and 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
  • 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