Articles

  • Article |

    Through degenerate Kerr four-wave mixing in ultrahigh-Q crystalline microresonators made of magnesium fluoride, tunable conversion of a compact, low-power telecommunications laser over an entire optical octave from 1,083 nm to 2,670 nm, with signatures of mid-infrared sidebands at almost 4,000 nm, is shown.

    • Noel Lito B. Sayson
    • , Toby Bi
    • , Vincent Ng
    • , Hoan Pham
    • , Luke S. Trainor
    • , Harald G. L. Schwefel
    • , Stéphane Coen
    • , Miro Erkintalo
    •  & Stuart G. Murdoch
  • Article |

    Video-rate imaging of the brains of awake mice with a field of view of 10 × 12 mm2 and a spatial resolution of 1.2 µm is accomplished.

    • Jingtao Fan
    • , Jinli Suo
    • , Jiamin Wu
    • , Hao Xie
    • , Yibing Shen
    • , Feng Chen
    • , Guijin Wang
    • , Liangcai Cao
    • , Guofan Jin
    • , Quansheng He
    • , Tianfu Li
    • , Guoming Luan
    • , Lingjie Kong
    • , Zhenrong Zheng
    •  & Qionghai Dai
  • Article |

    Combining resonant enhancement with nanophotonic mode engineering in a silicon nitride microring resonator allows spectral translation of a continuous-wave signal from the telecom band (~1,550 nm) to the visible band (~650 nm) through cavity-enhanced four-wave mixing with a translation efficiency of (30.1 ± 2.8)% at a pump power of (329 ± 13) μW.

    • Xiyuan Lu
    • , Gregory Moille
    • , Qing Li
    • , Daron A. Westly
    • , Anshuman Singh
    • , Ashutosh Rao
    • , Su-Peng Yu
    • , Travis C. Briles
    • , Scott B. Papp
    •  & Kartik Srinivasan
  • Article |

    An all-photonic quantum repeater is demonstrated by manipulating state-of-the-art 12-photon interferometry. The enhancement of entanglement-generation rate compared with parallel entanglement swapping proves the feasibility of the concept.

    • Zheng-Da Li
    • , Rui Zhang
    • , Xu-Fei Yin
    • , Li-Zheng Liu
    • , Yi Hu
    • , Yu-Qiang Fang
    • , Yue-Yang Fei
    • , Xiao Jiang
    • , Jun Zhang
    • , Li Li
    • , Nai-Le Liu
    • , Feihu Xu
    • , Yu-Ao Chen
    •  & Jian-Wei Pan
  • Article |

    The distribution of Berry charge over a ring of exceptional points, called a Weyl exceptional ring, is experimentally demonstrated.

    • Alexander Cerjan
    • , Sheng Huang
    • , Mohan Wang
    • , Kevin P. Chen
    • , Yidong Chong
    •  & Mikael C. Rechtsman
  • Article |

    The combined technique of dual-comb multi-heterodyne detection and Fourier-transform analysis allows simultaneous acquisition and monitoring of the phase pattern of a generic frequency comb demonstrating the high degree of coherence of the emission of two quantum cascade laser frequency combs.

    • Francesco Cappelli
    • , Luigi Consolino
    • , Giulio Campo
    • , Iacopo Galli
    • , Davide Mazzotti
    • , Annamaria Campa
    • , Mario Siciliani de Cumis
    • , Pablo Cancio Pastor
    • , Roberto Eramo
    • , Markus Rösch
    • , Mattias Beck
    • , Giacomo Scalari
    • , Jérôme Faist
    • , Paolo De Natale
    •  & Saverio Bartalini
  • Article |

    A method to control the polarization of a Compton gamma-ray beam is developed. By using a free-electron laser oscillator with two helical undulator magnets of opposite helicities, Compton gamma-ray beams with a polarizability of 0.97 are generated.

    • Jun Yan
    • , Jonathan M. Mueller
    • , Mohammad W. Ahmed
    • , Hao Hao
    • , Senlin Huang
    • , Jingyi Li
    • , Vladimir N. Litvinenko
    • , Peifan Liu
    • , Stepan F. Mikhailov
    • , Victor G. Popov
    • , Mark H. Sikora
    • , Nikolay A. Vinokurov
    •  & Ying K. Wu
  • Article |

    The polarization structure around polarization singularities can exhibit arbitrary fractional rotations when tracing around the singularity, due to an underlying topology of a torus knot imprinted by the chosen ratio of frequencies contained in the light beam.

    • Emilio Pisanty
    • , Gerard J. Machado
    • , Verónica Vicuña-Hernández
    • , Antonio Picón
    • , Alessio Celi
    • , Juan P. Torres
    •  & Maciej Lewenstein
  • Article |

    A two-step sequential broadband nanofocusing technique offers an external efficiency of ~50% over nearly all the visible range on a fibre-coupled plasmonic nanowire probe. Its integration with a scanning tunnelling microscope realizes lens-free tip-enhanced Raman spectroscopy with 1 nm spatial resolution.

    • Sanggon Kim
    • , Ning Yu
    • , Xuezhi Ma
    • , Yangzhi Zhu
    • , Qiushi Liu
    • , Ming Liu
    •  & Ruoxue Yan
  • Article |

    Femtosecond laser pulses can generate self-organized nonlinear gratings in nanophotonic waveguides, providing both quasi-phase-matching and group-velocity matching for second-harmonic generation, and enabling simultaneous χ2 and χ3 nonlinear processes for laser-frequency-comb stabilization.

    • Daniel D. Hickstein
    • , David R. Carlson
    • , Haridas Mundoor
    • , Jacob B. Khurgin
    • , Kartik Srinivasan
    • , Daron Westly
    • , Abijith Kowligy
    • , Ivan I. Smalyukh
    • , Scott A. Diddams
    •  & Scott B. Papp
  • Article |

    The photo-instability of perovskite solar cells is investigated and controlled by the use of a passivation strategy.

    • Silvia G. Motti
    • , Daniele Meggiolaro
    • , Alex J. Barker
    • , Edoardo Mosconi
    • , Carlo Andrea Riccardo Perini
    • , James M. Ball
    • , Marina Gandini
    • , Min Kim
    • , Filippo De Angelis
    •  & Annamaria Petrozza
  • Article |

    By combining a single-photon time-of-flight camera with computational processing of the spatial and full temporal photon distribution data, an object embedded inside a strongly diffusive medium can be imaged over more than 80 transport mean free paths in a contactless manner on the timescale of the order of 1 s.

    • Ashley Lyons
    • , Francesco Tonolini
    • , Alessandro Boccolini
    • , Audrey Repetti
    • , Robert Henderson
    • , Yves Wiaux
    •  & Daniele Faccio
  • Article |

    Two optical signatures of amyloid fibres—luminescence in the blue and a near-infrared signal, which can be observed in in vitro and in vivo tissues—are reported. The findings allow for staining-free characterization of amyloid deposits in human samples and could open the door to innovative diagnostic strategies for neurodegenerative diseases.

    • Jonathan Pansieri
    • , Véronique Josserand
    • , Sun-Jae Lee
    • , Anaëlle Rongier
    • , Daniel Imbert
    • , Marcelle Moulin Sallanon
    • , Enikö Kövari
    • , Thomas G. Dane
    • , Charlotte Vendrely
    • , Odette Chaix-Pluchery
    • , Mélanie Guidetti
    • , Julien Vollaire
    • , Arnold Fertin
    • , Yves Usson
    • , Patrice Rannou
    • , Jean-Luc Coll
    • , Christel Marquette
    •  & Vincent Forge
  • Article |

    Photoacoustic detection highly localized with a pulsed ultraviolet laser based on the Grüneisen relaxation effect allows water-background suppressed mid-infrared (MIR) imaging of lipids and proteins at ultraviolet resolution, at least an order of magnitude finer than the MIR diffraction limits.

    • Junhui Shi
    • , Terence T. W. Wong
    • , Yun He
    • , Lei Li
    • , Ruiying Zhang
    • , Christopher S. Yung
    • , Jeeseong Hwang
    • , Konstantin Maslov
    •  & Lihong V. Wang
  • Article |

    Efficient power transfer from the pump to the soliton can be achieved through field coupling between two optical resonators, allowing soliton frequency comb generation with tens-to-hundreds-of-fold improvement in conversion efficiency compared with a traditional single-resonator comb.

    • Xiaoxiao Xue
    • , Xiaoping Zheng
    •  & Bingkun Zhou
  • Article |

    All-optical control of the topological excitations of a superfluid of light is demonstrated in a high-quality-factor semiconductor microcavity. Recovery of superfluid behaviour at high polariton densities and bosonic Josephson vortices are observed.

    • Davide Caputo
    • , Nataliya Bobrovska
    • , Dario Ballarini
    • , Michal Matuszewski
    • , Milena De Giorgi
    • , Lorenzo Dominici
    • , Kenneth West
    • , Loren N. Pfeiffer
    • , Giuseppe Gigli
    •  & Daniele Sanvitto
  • Article |

    Echo-enabled harmonic generation in a free-electron laser enables 45th harmonic pulses from a 264 nm wavelength seed, yielding 5.9 nm wavelength coherent output.

    • Primož Rebernik Ribič
    • , Alessandro Abrami
    • , Laura Badano
    • , Maurizio Bossi
    • , Hans-Heinrich Braun
    • , Niky Bruchon
    • , Flavio Capotondi
    • , Davide Castronovo
    • , Marco Cautero
    • , Paolo Cinquegrana
    • , Marcello Coreno
    • , Marie Emmanuelle Couprie
    • , Ivan Cudin
    • , Miltcho Boyanov Danailov
    • , Giovanni De Ninno
    • , Alexander Demidovich
    • , Simone Di Mitri
    • , Bruno Diviacco
    • , William M. Fawley
    • , Chao Feng
    • , Mario Ferianis
    • , Eugenio Ferrari
    • , Laura Foglia
    • , Fabio Frassetto
    • , Giulio Gaio
    • , David Garzella
    • , Amin Ghaith
    • , Fabio Giacuzzo
    • , Luca Giannessi
    • , Vanessa Grattoni
    • , Sandi Grulja
    • , Erik Hemsing
    • , Fatma Iazzourene
    • , Gabor Kurdi
    • , Marco Lonza
    • , Nicola Mahne
    • , Marco Malvestuto
    • , Michele Manfredda
    • , Claudio Masciovecchio
    • , Paolo Miotti
    • , Najmeh S. Mirian
    • , Ivaylo Petrov Nikolov
    • , Giuseppe Maria Penco
    • , Gregory Penn
    • , Luca Poletto
    • , Mihai Pop
    • , Eduard Prat
    • , Emiliano Principi
    • , Lorenzo Raimondi
    • , Sven Reiche
    • , Eléonore Roussel
    • , Roberto Sauro
    • , Claudio Scafuri
    • , Paolo Sigalotti
    • , Simone Spampinati
    • , Carlo Spezzani
    • , Luca Sturari
    • , Michele Svandrlik
    • , Takanori Tanikawa
    • , Mauro Trovó
    • , Marco Veronese
    • , Davide Vivoda
    • , Dao Xiang
    • , Maurizio Zaccaria
    • , Dino Zangrando
    • , Marco Zangrando
    •  & Enrico Massimiliano Allaria
  • Article |

    Optical soliton dynamics in large-core hollow capillary fibres is demonstrated. The findings enable the scaling of soliton effects by several orders of magnitude to the multi-millijoule energy and terawatt peak power levels, and open up opportunities for new-generation table-top light sources for ultrafast strong-field physics and advanced spectroscopy.

    • John C. Travers
    • , Teodora F. Grigorova
    • , Christian Brahms
    •  & Federico Belli
  • Article |

    Stereo images of gold nanoparticles in a pyramid shape are reconstructed from X-ray coherent diffraction patterns. Depth information is retrieved by computing disparity maps without a priori knowledge of the sample shape.

    • J. Duarte
    • , R. Cassin
    • , J. Huijts
    • , B. Iwan
    • , F. Fortuna
    • , L. Delbecq
    • , H. Chapman
    • , M. Fajardo
    • , M. Kovacev
    • , W. Boutu
    •  & H. Merdji
  • Article |

    Interferometric scattering microscopy is employed to track proteins in live cell membranes, demonstrating tracking of transmembrane epidermal growth factor receptors with nanometre precision in all three dimensions at up to microsecond speeds and for durations of tens of minutes.

    • Richard W. Taylor
    • , Reza Gholami Mahmoodabadi
    • , Verena Rauschenberger
    • , Andreas Giessl
    • , Alexandra Schambony
    •  & Vahid Sandoghdar
  • Article |

    Planar perovskite solar cells that have been passivated using the organic halide salt phenethylammonium iodide are shown to have suppressed non-radiative recombination and operate with a certified power conversion efficiency of 23.3%.

    • Qi Jiang
    • , Yang Zhao
    • , Xingwang Zhang
    • , Xiaolei Yang
    • , Yong Chen
    • , Zema Chu
    • , Qiufeng Ye
    • , Xingxing Li
    • , Zhigang Yin
    •  & Jingbi You
  • Article |

    By entangling the phase and spin of light, a synthetic metasurface is shown to be able to coherently manipulate the valley-exciton-locked chiral emission in monolayer tungsten disulfide at room temperature. The findings will be of benefit to advanced room-temperature and free-space nonlinear, quantum and valleytronic nanodevices.

    • Guangwei Hu
    • , Xuanmiao Hong
    • , Kai Wang
    • , Jing Wu
    • , He-Xiu Xu
    • , Wenchao Zhao
    • , Weiwei Liu
    • , Shuang Zhang
    • , Francisco Garcia-Vidal
    • , Bing Wang
    • , Peixiang Lu
    •  & Cheng-Wei Qiu
  • Article |

    Improved understanding of passivation leads to near-infrared perovskite light-emitting diodes with 21.6% external quantum efficiency.

    • Weidong Xu
    • , Qi Hu
    • , Sai Bai
    • , Chunxiong Bao
    • , Yanfeng Miao
    • , Zhongcheng Yuan
    • , Tetiana Borzda
    • , Alex J. Barker
    • , Elizaveta Tyukalova
    • , Zhangjun Hu
    • , Maciej Kawecki
    • , Heyong Wang
    • , Zhibo Yan
    • , Xianjie Liu
    • , Xiaobo Shi
    • , Kajsa Uvdal
    • , Mats Fahlman
    • , Wenjing Zhang
    • , Martial Duchamp
    • , Jun-Ming Liu
    • , Annamaria Petrozza
    • , Jianpu Wang
    • , Li-Min Liu
    • , Wei Huang
    •  & Feng Gao
  • Article |

    Mechanical stability of macroscopic structures on the millimetre-, centimetre- and even metre-scale could be realized by tailoring the anisotropy of light scattering along the object’s surface, without needing to focus incident light or excessively constrain the shape, size or material composition of the object.

    • Ognjen Ilic
    •  & Harry A. Atwater
  • Article |

    Based on optically breaking time-reversal symmetry by spin polarizing a gain medium with a circularly polarized optical pump, an integrated scheme for controlling the chirality of orbital angular momentum lasing is demonstrated.

    • N. Carlon Zambon
    • , P. St-Jean
    • , M. Milićević
    • , A. Lemaître
    • , A. Harouri
    • , L. Le Gratiet
    • , O. Bleu
    • , D. D. Solnyshkov
    • , G. Malpuech
    • , I. Sagnes
    • , S. Ravets
    • , A. Amo
    •  & J. Bloch
  • Article |

    Electron–phonon coupling in a monolayer WSe2 on a substrate is investigated by femtosecond surface X-ray scattering. Counterintuitively, the absorbed optical photon energy is dominantly coupled to the in-plane lattice vibrations within 1 ps.

    • I-Cheng Tung
    • , Aravind Krishnamoorthy
    • , Sridhar Sadasivam
    • , Hua Zhou
    • , Qi Zhang
    • , Kyle L. Seyler
    • , Genevieve Clark
    • , Ehren M. Mannebach
    • , Clara Nyby
    • , Friederike Ernst
    • , Diling Zhu
    • , James M. Glownia
    • , Michael E. Kozina
    • , Sanghoon Song
    • , Silke Nelson
    • , Hiroyuki Kumazoe
    • , Fuyuki Shimojo
    • , Rajiv K. Kalia
    • , Priya Vashishta
    • , Pierre Darancet
    • , Tony F. Heinz
    • , Aiichiro Nakano
    • , Xiaodong Xu
    • , Aaron M. Lindenberg
    •  & Haidan Wen
  • Article |

    Optical guiding by a synthetic gauge field is experimentally demonstrated through an array of evanescently coupled identical waveguides, opening the door to applications of artificial gauge fields in optical, microwave and acoustic systems and in cold atoms.

    • Yaakov Lumer
    • , Miguel A. Bandres
    • , Matthias Heinrich
    • , Lukas J. Maczewsky
    • , Hanan Herzig-Sheinfux
    • , Alexander Szameit
    •  & Mordechai Segev
  • Article |

    Transverse localization of transmission eigenchannels is discovered in random optical media even in the diffusive regime of propagation far from Anderson localization. These findings will have significant impact on imaging and the control of light–matter interactions in scattering systems.

    • Hasan Yılmaz
    • , Chia Wei Hsu
    • , Alexey Yamilov
    •  & Hui Cao
  • Article |

    A proof-of-principle experiment on twin-field quantum key distribution is demonstrated. The key rate overcomes the repeaterless secret key capacity bound limit at channel losses of 85 dB, corresponding to 530 km of ultralow-loss optical fibre.

    • M. Minder
    • , M. Pittaluga
    • , G. L. Roberts
    • , M. Lucamarini
    • , J. F. Dynes
    • , Z. L. Yuan
    •  & A. J. Shields
  • Article |

    A quantum memory for single-photon polarization qubits with an efficiency of >85% and a fidelity of >99% is demonstrated. It is achieved by suppressing the noise and by controlling the spectral–temporal states of single photons in laser-cooled Rb atoms.

    • Yunfei Wang
    • , Jianfeng Li
    • , Shanchao Zhang
    • , Keyu Su
    • , Yiru Zhou
    • , Kaiyu Liao
    • , Shengwang Du
    • , Hui Yan
    •  & Shi-Liang Zhu
  • Article |

    A laser-based scheme for the simultaneous generation of two temporally synchronized electron beams with individually adjustable energies offers new opportunities for ultrafast pump–probe experiments.

    • J. Wenz
    • , A. Döpp
    • , K. Khrennikov
    • , S. Schindler
    • , M. F. Gilljohann
    • , H. Ding
    • , J. Götzfried
    • , A. Buck
    • , J. Xu
    • , M. Heigoldt
    • , W. Helml
    • , L. Veisz
    •  & S. Karsch
  • Article |

    A time-domain approach that can continuously tune the polarization state of extreme-ultraviolet attosecond pulses allows the isolation and amplification of extremely weak chiral signals, extending vectorial measurements to the attosecond and nanometre scales.

    • Doron Azoury
    • , Omer Kneller
    • , Michael Krüger
    • , Barry D. Bruner
    • , Oren Cohen
    • , Yann Mairesse
    •  & Nirit Dudovich
  • Article |

    An atom–light Schrödinger-cat state is deterministically created by reflecting laser pulses from a high-finesse optical cavity containing a single 87Rb atom. A CNOT-type operation is also demonstrated between the atomic qubit and the optical qubit.

    • Bastian Hacker
    • , Stephan Welte
    • , Severin Daiss
    • , Armin Shaukat
    • , Stephan Ritter
    • , Lin Li
    •  & Gerhard Rempe
  • Article |

    Characterizing not only the fluorescence intensity but also the inherent quantum correlations of the fluorescent photon stream can enhance the spatial resolution of image scanning microscopy up to twofold, a fourfold improvement over the diffraction limit.

    • Ron Tenne
    • , Uri Rossman
    • , Batel Rephael
    • , Yonatan Israel
    • , Alexander Krupinski-Ptaszek
    • , Radek Lapkiewicz
    • , Yaron Silberberg
    •  & Dan Oron
  • Article |

    A terawatt picosecond CO2 laser beam is shown to form a centimetre-scale-diameter filament in air that is capable of carrying several joules of energy.

    • Sergei Tochitsky
    • , Eric Welch
    • , Mikhail Polyanskiy
    • , Igor Pogorelsky
    • , Paris Panagiotopoulos
    • , Miroslav Kolesik
    • , Ewan M. Wright
    • , Stephan W. Koch
    • , Jerome V. Moloney
    • , Jeremy Pigeon
    •  & Chan Joshi
  • Article |

    Brillouin lasing with 0.7 Hz fundamental linewidth is observed by optically exciting a monolithic bus–ring Si3N4 waveguide resonator. The Brillouin laser is applied to an optical gyroscope and a low phase-noise photonic microwave oscillator.

    • Sarat Gundavarapu
    • , Grant M. Brodnik
    • , Matthew Puckett
    • , Taran Huffman
    • , Debapam Bose
    • , Ryan Behunin
    • , Jianfeng Wu
    • , Tiequn Qiu
    • , Cátia Pinho
    • , Nitesh Chauhan
    • , Jim Nohava
    • , Peter T. Rakich
    • , Karl D. Nelson
    • , Mary Salit
    •  & Daniel J. Blumenthal
  • Article |

    Simultaneous spin and orbital angular momentum conservation enables control over the divergence and polarization of EUV vortex beams, paving the way to ultrafast studies of chiral systems using high-harmonic beams with designer spin and orbital angular momentum.

    • Kevin M. Dorney
    • , Laura Rego
    • , Nathan J. Brooks
    • , Julio San Román
    • , Chen-Ting Liao
    • , Jennifer L. Ellis
    • , Dmitriy Zusin
    • , Christian Gentry
    • , Quynh L. Nguyen
    • , Justin M. Shaw
    • , Antonio Picón
    • , Luis Plaja
    • , Henry C. Kapteyn
    • , Margaret M. Murnane
    •  & Carlos Hernández-García