Optics and photonics articles within Nature Photonics

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  • News & Views |

    Due to dispersion, the group velocity of laser pulses propagating in plasmas slows down with increasing wavelength, which presents challenges for precision-controlled plasma interactions. Now, new techniques for spatio-temporal pulse shaping have lifted this limitation in the demonstration of short-pulse table-top soft X-ray lasers.

    • Sam K. Barber

  • News & Views |

    The Ti:Sa laser, a workhorse of any optics laboratory, is typically a bench-top system. A hybrid integration approach now enables a low-threshold photonic-circuit-integrated Ti:Sa laser the size of a fingernail.

    • Arnan Mitchell
    •  & Heike Ebendorff-Heidepriem

  • News & Views |

    A photothermal microscopy technique overcomes the diffraction limit by exploiting the spatiotemporal dynamics of heat dissipation within the imaging volume, offering new opportunities for super-resolution, bond-selective and label-free imaging of biological targets.

    • Zhilun Zhao
    •  & Wei Min

  • Comment |

    In recent decades, progress in developing better nonlinear materials has not been as rapid as wished. Here I propose that this may be explained by considering the simple view of nonlinear optical phenomena as being determined mostly by the length of interaction time between photons and matter. Tentative routes towards improvements in the efficiency of nonlinear optical phenomena are suggested.

    • Jacob B. Khurgin

  • Article
    | Open Access

    The addition of a strong coupling layer allows polariton-based emission from red and green organic light-emitting diodes with high external quantum efficiency up to 10%, linewidth smaller than 20 nm and angle-independent emission, with spectral shifts smaller than 10 nm over a 60° angular tilt.

    • Andreas Mischok
    • , Sabina Hillebrandt
    •  & Malte C. Gather

  • Article
    | Open Access

    Current LiDAR approaches suffer from congestion issues, which affect measurement performance and increased system complexity. Now researchers demonstrate a chaotic microcomb that exhibits congestion-immune naturally orthogonalized light channels.

    • Ruixuan Chen
    • , Haowen Shu
    •  & Xingjun Wang

  • Article |

    A quantum key distribution with a key rate of 115.8 Mb s–1 is demonstrated over 10 km standard optical fibre. To this end, a high-speed and stable system, an integrated transmitter for low error modulation and multipixel superconducting nanowire single-photon detectors are developed.

    • Wei Li
    • , Likang Zhang
    •  & Jian-Wei Pan

  • News & Views |

    A field trial in the Swiss mountains demonstrating that an intense laser beam can guide lightning discharge over tens of metres gives hope for the development of a new form of mobile lightning protection.

    • Cord L. Arnold
    • , Clara J. Saraceno
    •  & M. Teresa Correia de Barros

  • News & Views |

    X-ray photons emitted by free electrons travelling in van der Waals materials show energy shifts induced by quantum recoil, thus offering a viable route to generating tailored and tunable single X-ray photons.

    • Nahid Talebi

  • Article |

    Single-crystal perovskite LEDs exhibit reduced ion migration and Auger recombination and increased device lifetime. Perovskite single-crystals-based LEDs exhibit a maximum brightness of 86,000 cd m−2, a peak EQE of 11.2% and T50 lifetime of 12,500 h at an initial luminance of 100 cd m−2.

    • Wenjing Chen
    • , Zongming Huang
    •  & Zhengguo Xiao

  • Article
    | Open Access

    A continuous string of indistinguishable photons entangled in a cluster state is generated on demand from an InAs/GaAs quantum dot. The confined heavy-hole spin is used as an entangler. Under an externally tuned magnetic field, an optimized characteristic entanglement decay length of about ten photons is obtained.

    • Dan Cogan
    • , Zu-En Su
    •  & David Gershoni

  • News & Views |

    The near-field chirality of a single-symmetry achiral object enables polarization-dependent unidirectional photocurrent generation, and the vectorial output paves a way for a new family of geometric photodetectors.

    • Artur Movsesyan
    •  & Zhiming Wang

  • News & Views |

    A scheme for converting qubits between two different representations, discrete and continuous variables, paves the way for more-efficient quantum networks.

    • Hyunseok Jeong

  • News & Views |

    Enhancement of laser energy conversion into X-rays is obtained using a target made by entwined carbon nanotubes.

    • Andrea Macchi
    •  & Francesco Pegoraro

  • Article |

    A prototype integrated Ti:Sa laser is demonstrated by bonding the Ti:Sa gain medium on silicon nitride microring resonators. Lasing is demonstrated between 730 nm and 830 nm with a threshold power as low as 6.5 mW.

    • Yubo Wang
    • , Jorge A. Holguín-Lerma
    •  & Hong X. Tang

  • Letter
    | Open Access

    A hyperspectral camera based on a random array of CMOS-compatible Fabry–Pérot filters is demonstrated. The hyperspectral camera exhibits performance comparable with that of a typical RGB camera, with 45% sensitivity to visible light, a spatial resolution of 3 px for 3 dB contrast, and a frame rate of 32.3 fps at VGA resolution.

    • Motoki Yako
    • , Yoshikazu Yamaoka
    •  & Atsushi Ishikawa

  • Article |

    The combination of optical phase conjugation and light amplification enables wavefront shaping with simultaneously optimized operational speed, number of control degrees of freedom and energy of the focused wavefront. Shaping with a 10 μs latency time over about 106 control modes and energy gain approaching unity is demonstrated.

    • Zhongtao Cheng
    • , Chengmingyue Li
    •  & Lihong V. Wang

  • Obituary |

    Recollected by his colleagues as a creative and humble scholar with an indomitable will, Byoungho Lee was enthusiastic about realizing the holistic potential of holographic displays.

    • YongKeun Park
    • , Jae-Hyeung Park
    •  & Ting-Chung Poon

  • Article |

    Quantum recoil is experimentally observed via photon energy shifts in Smith–Purcell radiation. Leveraging van der Waals materials as atomic-scale gratings, the quantum recoil is measured at room temperature on a tabletop platform.

    • Sunchao Huang
    • , Ruihuan Duan
    •  & Liang Jie Wong

  • Article
    | Open Access

    A terawatt laser filament is shown to be able to guide lightning over a distance of 50 m in field trials on the Säntis mountain in the Swiss Alps.

    • Aurélien Houard
    • , Pierre Walch
    •  & Jean-Pierre Wolf

  • Article |

    Relative synchronization between free-electron laser pulses and a near-infrared field fields is achieved with 24 as resolution by using a correlation analysis of single-shot photoelectron spectra. It is applied to coherently control the photoionization process in neon atom on the attosecond timescale.

    • Praveen Kumar Maroju
    • , Michele Di Fraia
    •  & Giuseppe Sansone

  • Article |

    A chip-scale laser platform based on silicon nitride ring resonators and commercial Fabry–Pérot laser diodes is developed for the wavelength range from 404 nm to 785 nm. The achieved coarse and fine tunings are up to 12.5 nm and 33.9 GHz, respectively, with kilohertz-scale linewidths and side-mode suppression ratios above 35 dB.

    • Mateus Corato-Zanarella
    • , Andres Gil-Molina
    •  & Michal Lipson

  • Editorial |

    Early research towards bulk metamaterials and exotic properties has been supplanted by work on thin metasurfaces ripe for commercialization, as outlined in this Focus issue.

  • Q&A |

    George Palikaras, President and CEO of Meta Materials Inc., discusses the challenges of commercializing metamaterials, learned on the path from a small start-up to a Nasdaq-listed company.

    • David Pile

  • Q&A |

    Geoffroy Lerosey, co-founder and CEO/CSO of Greenerwave, shares how tunable metasurfaces may shake up industries from automotive to wireless communications.

    • David Pile

  • News & Views |

    The resonance wavelengths of optical Möbius strip microcavities can be continuously tuned via geometric phase manipulation by changing the thickness-to-width ratio of the strip.

    • Bruno Piccirillo
    •  & Verónica Vicuña-Hernández

  • Article
    | Open Access

    The existence of the optical Berry phase in all-dielectric Möbius-strip cavities is experimentally confirmed. In contrast to a predicted sole Berry phase value of π, arbitrary values of the Berry phase upon adiabatic evolution of a linearly or elliptically polarized light wave are obtained.

    • Jiawei Wang
    • , Sreeramulu Valligatla
    •  & Oliver G. Schmidt

  • Review Article |

    Nonlocal effects—in which the optical response of a system at a given spatial point depends on the field in the surrounding space—are reviewed in the context of metasurfaces and flat optics. Nonlocal flat optics may be useful for controlling light in ultra-thin platforms.

    • Kunal Shastri
    •  & Francesco Monticone

  • Review Article |

    Recent advances in optical metalenses are reviewed with a focus on their unique features and applications in the space of optical metasystems.

    • Amir Arbabi
    •  & Andrei Faraon

  • Review Article |

    Recent developments in reconfigurable metasurfaces are reviewed with a focus on case studies that are promising for commercialization and associated challenges.

    • Tian Gu
    • , Hyun Jung Kim
    •  & Juejun Hu

  • Article |

    A conversion of quantum information between single-photon and cat-state qubits is demonstrated by teleportation using optical hybrid entanglement. The classical limit of conversion is exceeded over the full Bloch sphere, with an average fidelity above 79%.

    • Tom Darras
    • , Beate Elisabeth Asenbeck
    •  & Julien Laurat

  • Review Article |

    Robotic and other devices often demand ever more compact and sophisticated sensors. This Review assesses the opportunities for metasurfaces to provide optical functionality solutions for such applications.

    • Dragomir N. Neshev
    •  & Andrey E. Miroshnichenko

  • News & Views |

    Using two different designs of superconductor-based detectors, two independent research groups report photon number detection for light pulses with up to 100 photons.

    • Tim J. Bartley

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