Optics and photonics

  • Article |

    The realization of large-scale exciton–polariton platforms operating at room temperature and exhibiting long-lived, strongly interacting excitons has been elusive. Here, the authors demonstrate a room-temperature perovskite-based polaritonic platform with a polariton lattice size of up to 10 × 10.

    • Renjie Tao
    • , Kai Peng
    •  & Wei Bao
  • Article |

    A multiscale modelling platform combining nanoscale resonant scattering, mesoscale multiple scattering and macroscale light transport effectively predicts the macroscopic visual effects created by optical metamaterials with disordered nanostructures.

    • Kevin Vynck
    • , Romain Pacanowski
    •  & Philippe Lalanne
  • Article |

    Departing from common approaches to designing Floquet topological insulators, here the authors present a photonic realization of Floquet topological insulators revealing topological phases that simultaneously support Chern and anomalous topological states.

    • Georgios G. Pyrialakos
    • , Julius Beck
    •  & Demetrios N. Christodoulides
  • Article |

    Cu2O is a promising platform to host Rydberg exciton–polaritons, where excitons strongly couple to cavity photons, however their realization has been elusive. Here, the authors report Rydberg exciton–polaritons with principal quantum numbers up to n = 6.

    • Konstantinos Orfanakis
    • , Sai Kiran Rajendran
    •  & Hamid Ohadi
  • Article |

    Measuring three-dimensional dielectric tensors is desired for applications in material and soft matter physics. Here, the authors use a tomographic approach and inversely solve the vectorial wave equation to directly reconstruct dielectric tensors of anisotropic structures.

    • Seungwoo Shin
    • , Jonghee Eun
    •  & YongKeun Park
  • Article |

    Controlled synthesis of heterostructured III-V–II-VI nanocrystals shows that dipole moments formed at the core–shell interface can tune the optoelectronic properties of these nanomaterials and their performance in light-emitting devices.

    • Byeong Guk Jeong
    • , Jun Hyuk Chang
    •  & Wan Ki Bae
  • Article |

    The large-scale fabrication of cellulose nanocrystal photonic films in a roll-to-roll device is achieved by careful optimization of the cellulose nanocrystal formulation and its controlled deposition and drying on a substrate. Once dry, these photonic films can be peeled and milled into effect pigments, highlighting the potential of cellulose nanocrystals as a sustainable material for industrial photonic applications.

    • Benjamin E. Droguet
    • , Hsin-Ling Liang
    •  & Silvia Vignolini
  • Article |

    A strategy to confine phosphorescent organic chromophores within ionic crystals proves effective in suppressing non-radiative recombination channels and increasing the phosphorescence efficiency of blue-emitting heavy-atom-free emitters.

    • Wenpeng Ye
    • , Huili Ma
    •  & Wei Huang
  • Review Article |

    This Review discusses the photophysical properties and nonlinear behaviour of single molecules, and their use as single-photon sources and in single-molecule sensing and quantum-sensing applications.

    • C. Toninelli
    • , I. Gerhardt
    •  & M. Orrit
  • Article |

    Stacked elastomeric arrays containing plasmonic nanoparticles show efficient chiral responses that can be fully controlled by mechanical compression and stack rotation. These simple layered materials may be useful modulators for photonic applications.

    • Patrick T. Probst
    • , Martin Mayer
    •  & Andreas Fery
  • Article |

    A second-order topological Weyl semimetal based on a 3D-printed acoustic crystal, exhibiting Weyl points, Fermi arc surface states, and hinge states, has been experimentally demonstrated.

    • Qiang Wei
    • , Xuewei Zhang
    •  & Suotang Jia
  • Review Article |

    The development of perovskite emitters, their use in light-emitting devices, and the challenges in enhancing the efficiency and stability, as well as reducing the potential toxicity of this technology are discussed in this Review.

    • Xiao-Ke Liu
    • , Weidong Xu
    •  & Feng Gao
  • Review Article |

    Thermoplasmonics is based on the use of plasmonic nanoparticles as sources of heat remotely controlled by light. This Review discusses its current applications and challenges in a broad range of scientific fields, from nanomedicine to hot-electron chemistry and nanofluidics.

    • Guillaume Baffou
    • , Frank Cichos
    •  & Romain Quidant
  • Letter |

    The integration of barium titanate thin films with silicon-based waveguides enables the operation of efficient electro-optic switches and modulators at temperatures as low as 4 K, with potential applications in quantum computing and cryogenic computing technologies.

    • Felix Eltes
    • , Gerardo E. Villarreal-Garcia
    •  & Stefan Abel
  • Article |

    Electric-field tunable plasmonic excitations in semiconducting carbon nanotubes are shown to behave consistently with the nonlinear Luttinger liquid theory, providing a platform to study non-conventional one-dimensional electron dynamics and realize integrated nanophotonic devices.

    • Sheng Wang
    • , Sihan Zhao
    •  & Feng Wang
  • Article |

    Counter-propagating chiral edge states are demonstrated in a photonic structure able to effectively incorporate fermionic time-reversal symmetry, thus providing the photonic implementation of an electronic topological insulator.

    • Lukas J. Maczewsky
    • , Bastian Höckendorf
    •  & Alexander Szameit
  • Article |

    Vectorial electromagnetic modes in coupled metallic nanolasers are used to emulate the behaviour of complex magnetic materials, providing an integrated nanophotonic platform to study spin exchange interactions and map large-scale optimization problems.

    • Midya Parto
    • , William Hayenga
    •  & Mercedeh Khajavikhan
  • Article |

    Type-II van der Waals interfaces formed by different two-dimensional materials enable robust interlayer optical transitions, regardless of common issues such as lattice constant mismatch, layer misalignment or whether the constituent compounds are direct or indirect band semiconductors.

    • Nicolas Ubrig
    • , Evgeniy Ponomarev
    •  & Alberto F. Morpurgo
  • Letter |

    The ultrafast response of a pyroelectric sensor with near-infrared responsivity is demonstrated by combining a pyroelectric thermal detector with wavelength-selective nanoparticle absorbers.

    • Jon W. Stewart
    • , Jarrett H. Vella
    •  & Maiken H. Mikkelsen
  • Letter |

    Water clusters induce hole traps in organic semiconductor thin films. Detrimental effects of hole and electron traps on charge transport can be avoided by using materials with ionization energy and electron affinity within an energy window of 2.4 eV.

    • Naresh B. Kotadiya
    • , Anirban Mondal
    •  & Gert-Jan A. H. Wetzelaer
  • Letter |

    Due to the crystal symmetry of single-layer transition metal dichalcogenides and the fact that the conduction and valence band edges are at the zone-edge K points, the 2p exciton states are split. A two-colour pump–probe scheme is used to drive the 1s–2p exciton transition, and then probe the changes in absorption near the spectral position of the 1s line to measure the splitting energy.

    • Chaw-Keong Yong
    • , M. Iqbal Bakti Utama
    •  & Feng Wang
  • Review Article |

    Spatially resolved electron microscopy techniques, such as cathodoluminescence and electron energy-loss spectroscopy can provide high space, energy and time resolutions for the structural and optical characterization of materials; this Review discusses recent progress and future directions in the field of nanophotonics.

    • Albert Polman
    • , Mathieu Kociak
    •  & F. Javier García de Abajo
  • Review Article |

    This Review covers the basic physics of thermal emission, ways to engineer the thermal field radiated by hot objects in the far field and applications, such as thermophotovoltaics, radiative cooling, camouflage and privacy.

    • Denis G. Baranov
    • , Yuzhe Xiao
    •  & Mikhail A. Kats
  • Review Article |

    The droplet epitaxy technique has emerged as an alternative to the most commonly used Stranski–Krastanov for fabricating semiconductor nanostructures. This Review discusses the important aspects of droplet epitaxy quantum dots, from the growth mechanism to device application.

    • Massimo Gurioli
    • , Zhiming Wang
    •  & Stefano Sanguinetti