Applied optics articles within Nature

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  • Article
    | Open Access

    A miniaturized optical frequency division system that could transfer the generation of microwaves, with superior spectral purity, to a complementary metal-oxide-semiconductor-compatible integrated photonic platform is demonstrated showing potential for large-volume, low-cost manufacturing for many applications.

    • Shuman Sun
    • , Beichen Wang
    •  & Xu Yi

  • Article |

    An integrated device that combines optical parametric oscillation and electro-optic modulation in lithium niobate creates a flat-top frequency-comb-like output with low power requirements.

    • Hubert S. Stokowski
    • , Devin J. Dean
    •  & Amir H. Safavi-Naeini

  • Article |

    An integrated lithium niobate photonic processing engine performs integration and differentiation of analogue signals, solves ordinary differential equations, generates ultra-wideband microwave signals and detects edges in images.

    • Hanke Feng
    • , Tong Ge
    •  & Cheng Wang

  • Article |

    Optical nanoscale disk memory with petabit-level capacity is developed by extending the recording architecture to three dimensions with hundreds of layers, and exabit-level storage can be achieved by stacking the disks into arrays.

    • Miao Zhao
    • , Jing Wen
    •  & Min Gu

  • Article |

    Free-running stable optical dissipative solitons, called Nozaki–Bekki solitons, are created in a ring semiconductor laser; their spontaneous formation with tuning of laser bias eliminates the need for an external optical pump.

    • Nikola Opačak
    • , Dmitry Kazakov
    •  & Benedikt Schwarz

  • Article
    | Open Access

    An all-analog chip combining electronic and light computing achieves systemic energy efficiency of more than three orders of magnitude and a computing speed of more than one order of magnitude compared with state-of-the-art computing processors.

    • Yitong Chen
    • , Maimaiti Nazhamaiti
    •  & Qionghai Dai

  • Article |

    A route to greatly elevate joint densities of states by introducing a flat-band electronic structure is demonstrated, showing metallic λ-Ti3O5 powders have a high solar absorptivity and offering insights into access to cost-effective solar-to-steam generation.

    • Bo Yang
    • , Zhiming Zhang
    •  & Liang Zuo

  • Article |

    Distributed acoustic sensing technology is utilized to image four high-frequency rupture subevents of the 2021 Antelope Valley, California, earthquake; the results indicate that the subevents are due to the breaking of fault asperities.

    • Jiaxuan Li
    • , Taeho Kim
    •  & Zhongwen Zhan

  • Article |

    Heat-assisted detection and ranging is experimentally shown to see texture and depth through darkness as if it were day, and also perceives decluttered physical attributes beyond RGB or thermal vision.

    • Fanglin Bao
    • , Xueji Wang
    •  & Zubin Jacob

  • Article |

    Three-dimensional imaging using a frequency–angular resolving and frequency-modulated continuous-wave LiDAR enabled by a chip-scale acousto-optic beam-steering device has been demonstrated, with the simplicity and low cost of the device making this a promising technology.

    • Bingzhao Li
    • , Qixuan Lin
    •  & Mo Li

  • Article |

    A new transfer method for microLEDs fabrication based on fluidic self-assembly technology combining magnetic and dielectrophoresis forces is described, achieving a very high simultaneous RGB LED transfer yield and over large areas.

    • Wonjae Chang
    • , Jungsub Kim
    •  & Jeong Soo Lee

  • Article |

    Suppression of shallow traps responsible for dark count rates in polycrystalline methylammonium lead triiodide using diphenyl sulfide enables the production of metal-halide perovskite photon-counting detectors that allow sensitive detection of γ-ray spectra.

    • Ying Zhou
    • , Chengbin Fei
    •  & Jinsong Huang

  • Article
    | Open Access

    A frequency-tunable laser based on a hybrid silicon nitride and lithium niobate integrated photonic platform has a fast tuning rate and could be used for optical ranging applications.

    • Viacheslav Snigirev
    • , Annina Riedhauser
    •  & Tobias J. Kippenberg

  • Article |

    By using Si3N4 photonic integrated circuits on a silicon chip, a continuous-travelling-wave parametric amplifier is shown to yield a parametric gain exceeding both on-chip propagation loss as well as fibre–chip–fibre coupling losses.

    • Johann Riemensberger
    • , Nikolai Kuznetsov
    •  & Tobias J. Kippenberg

  • Article |

    A terrestrial networked positioning system based on a hybrid optical–wireless telecommunication infrastructure and that is independent of global navigation satellite systems is demonstrated for urban environments with decimetre-level accuracy. 

    • Jeroen C. J. Koelemeij
    • , Han Dun
    •  & Christian C. J. M. Tiberius

  • Article
    | Open Access

    A meta-imaging sensor detects an extra-fine 4D light field distribution using a vibrating microlens array, enabling high-resolution 3D photography up to a gigapixel with fast aberration correction, demonstrated on a telescope aimed at the Moon.

    • Jiamin Wu
    • , Yuduo Guo
    •  & Qionghai Dai

  • Article
    | Open Access

    Slow nonlinearities of a free-running microresonator-filtered fibre laser are shown to transform temporal cavity solitons into the system’s dominant attractor, leading to reliable self-starting oscillation of microcavity-solitons that are naturally robust to perturbations.

    • Maxwell Rowley
    • , Pierre-Henry Hanzard
    •  & Alessia Pasquazi

  • Article
    | Open Access

    Stochastic cooling at optical frequencies is demonstrated in an experiment at the Fermi National Accelerator Laboratory’s Integrable Optics Test Accelerator, substantially increasing the bandwidth of stochastic cooling compared with conventional systems.

    • J. Jarvis
    • , V. Lebedev
    •  & A. Valishev

  • Article
    | Open Access

    A simple and power-efficient microcomb source is used to drive complementary metal–oxide–semiconductor silicon photonic engines, a step towards the next generation of fully integrated photonic systems.

    • Haowen Shu
    • , Lin Chang
    •  & John E. Bowers

  • Article
    | Open Access

    Two-junction TPV cells with efficiencies of more than 40% are reported, using an emitter with a temperature between 1,900 and 2,400 °C, for integration into a TPV system for thermal energy grid storage.

    • Alina LaPotin
    • , Kevin L. Schulte
    •  & Asegun Henry

  • Article |

    Engineering of the coupling between optical modes in a lithium niobate chip enables the realization of tunable, bi-directional and low-loss electro-optic frequency shifters controlled using only continuous and single-tone microwaves.

    • Yaowen Hu
    • , Mengjie Yu
    •  & Marko Lončar

  • Article |

    A reinforcement learning experiment using a programmable integrated nanophotonic processor shows that a quantum communication channel with the environment speeds up the learning process of an agent.

    • V. Saggio
    • , B. E. Asenbeck
    •  & P. Walther

  • Article |

    An improved device design for perovskite-based photovoltaic cells enables a certified power conversion efficiency of 25.2 per cent, translating to 80.5 per cent of the thermodynamic limit for its bandgap, which approaches those achieved by silicon solar cells.

    • Jason J. Yoo
    • , Gabkyung Seo
    •  & Jangwon Seo

  • Article |

    A compact, high-performance silicon photonics-based light detection and ranging system for three-dimensional imaging is developed that should be amenable to low-cost mass manufacturing

    • Christopher Rogers
    • , Alexander Y. Piggott
    •  & Remus Nicolaescu

  • Article |

    A surface-electrode ion-trap chip is demonstrated, which delivers all the wavelengths of light required for the preparation and operation of ion qubits.

    • R. J. Niffenegger
    • , J. Stuart
    •  & J. Chiaverini

  • Review Article |

    The current state of programmable photonic integrated circuits is discussed, including recent developments in their building blocks, circuit architectures, electronic control and programming strategies, as well as different application spaces.

    • Wim Bogaerts
    • , Daniel Pérez
    •  & Andrea Melloni

  • Article |

    An air gap embedded within the structure of a thermophotovoltaic device acts as a near-perfect reflector of low-energy photons, resulting in their recovery and recycling by the thermal source, enabling excellent power-conversion efficiency.

    • Dejiu Fan
    • , Tobias Burger
    •  & Stephen R. Forrest

  • Article |

    By monolithically integrating piezoelectric actuators on ultralow-loss photonic circuits, soliton microcombs—a spectrum of sharp lines over a range of optical frequencies—can be modulated at high speeds with megahertz bandwidths.

    • Junqiu Liu
    • , Hao Tian
    •  & Tobias J. Kippenberg

  • Article |

    Combining thermal scanning-probe lithography with templating enables the production of high-quality gratings that manipulate light through Fourier-spectrum engineering in ways that are not achievable with conventional gratings.

    • Nolan Lassaline
    • , Raphael Brechbühler
    •  & David J. Norris

  • Article |

    A turnkey regime for soliton microcombs is demonstrated, in which solitons are generated by switching on a co-integrated pump laser, eliminating the need for photonic and electronic control circuitry.

    • Boqiang Shen
    • , Lin Chang
    •  & John E. Bowers

  • Article |

    A massively parallel coherent light detection and ranging (lidar) scheme using a soliton microcomb—a light source that emits a wide spectrum of sharp lines with equally spaced frequencies—is described.

    • Johann Riemensberger
    • , Anton Lukashchuk
    •  & Tobias J. Kippenberg

  • Article |

    A two-dimensional semiconductor photodiode array senses and processes optical images simultaneously without latency, and is trained to classify and encode images with high throughput, acting as an artificial neural network.

    • Lukas Mennel
    • , Joanna Symonowicz
    •  & Thomas Mueller

  • Article |

    precisely controllable integrated optical gyroscope based on stimulated Brillouin scattering is used to study non-Hermitian physics, revealing a four-fold enhancement of the Sagnac scale factor near exceptional points.

    • Yu-Hung Lai
    • , Yu-Kun Lu
    •  & Kerry Vahala

  • Letter |

    Room-temperature modulation frequencies exceeding 200 GHz are demonstrated in birefringent semiconductor spin-lasers by coupling the spin of the charge carriers to the light polarization.

    • Markus Lindemann
    • , Gaofeng Xu
    •  & Nils C. Gerhardt

  • Letter |

    Contrary to current expectation, eavesdropping on terahertz wireless data links is shown to be easier than expected, by placing an object in the path of the signal that scatters part of it to a receiver located elsewhere.

    • Jianjun Ma
    • , Rabi Shrestha
    •  & Daniel M. Mittleman

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