Latest Research

  • Letter |

    An experimental study of the second-harmonic-generation process in a beta barium borate crystal shows that homogeneous optical crystals can exhibit the rich physics of the spin–orbit angular momentum cascade in the nonlinear optical regime.

    • Yutao Tang
    • , Kingfai Li
    • , Xuecai Zhang
    • , Junhong Deng
    • , Guixin Li
    •  & Etienne Brasselet
  • Article |

    Engineering of the spatial distribution of currents in a semiconductor is demonstrated using vectorial arrangement of optical fields, enabling an ultrafast magnetic field source.

    • Shawn Sederberg
    • , Fanqi Kong
    • , Felix Hufnagel
    • , Chunmei Zhang
    • , Ebrahim Karimi
    •  & Paul B. Corkum
  • Article |

    Tunable X-ray generation, from ultrathin van der Waals materials impacted by relativistic electrons, is demonstrated.

    • Michael Shentcis
    • , Adam K. Budniak
    • , Xihang Shi
    • , Raphael Dahan
    • , Yaniv Kurman
    • , Michael Kalina
    • , Hanan Herzig Sheinfux
    • , Mark Blei
    • , Mark Kamper Svendsen
    • , Yaron Amouyal
    • , Sefaattin Tongay
    • , Kristian Sommer Thygesen
    • , Frank H. L. Koppens
    • , Efrat Lifshitz
    • , F. Javier García de Abajo
    • , Liang Jie Wong
    •  & Ido Kaminer
  • Letter |

    The Kramers–Kronig approach is applied to high-capacity, free-space terahertz communications, bringing a greatly simplified receiver design.

    • T. Harter
    • , C. Füllner
    • , J. N. Kemal
    • , S. Ummethala
    • , J. L. Steinmann
    • , M. Brosi
    • , J. L. Hesler
    • , E. Bründermann
    • , A.-S. Müller
    • , W. Freude
    • , S. Randel
    •  & C. Koos
  • Review Article |

    Recent improvements of the operation speed of variable optical elements are reviewed with an emphasis on components with microsecond focus-varying response time.

    • SeungYeon Kang
    • , Martí Duocastella
    •  & Craig B. Arnold
  • Letter |

    Moiré lattices optically induced in photorefractive nonlinear media are used to explain the formation of optical solitons under different geometrical conditions controlled by the twisting angle between the constitutive sublattices.

    • Qidong Fu
    • , Peng Wang
    • , Changming Huang
    • , Yaroslav V. Kartashov
    • , Lluis Torner
    • , Vladimir V. Konotop
    •  & Fangwei Ye
  • Article |

    Relativistic 35 MeV electron bunches with charges of 60 pC are accelerated in a terahertz-wave-driven dielectric waveguide. When the terahertz pulse energy is 0.8 μJ, an accelerating gradient of 2 MeV m−1 and energy gain of 10 keV are achieved.

    • Morgan T. Hibberd
    • , Alisa L. Healy
    • , Daniel S. Lake
    • , Vasileios Georgiadis
    • , Elliott J. H. Smith
    • , Oliver J. Finlay
    • , Thomas H. Pacey
    • , James K. Jones
    • , Yuri Saveliev
    • , David A. Walsh
    • , Edward W. Snedden
    • , Robert B. Appleby
    • , Graeme Burt
    • , Darren M. Graham
    •  & Steven P. Jamison
  • Article |

    Through the use of a plasmon-active atomically sharp tip and an ultrathin insulating film, and precise junction control in a highly confined nanocavity plasmon field at the scanning tunnelling microscope junction, sub-nanometre-resolved single-molecule near-field photoluminescence imaging with a spatial resolution down to 8 Å is achieved.

    • Ben Yang
    • , Gong Chen
    • , Atif Ghafoor
    • , Yufan Zhang
    • , Yao Zhang
    • , Yang Zhang
    • , Yi Luo
    • , Jinlong Yang
    • , Vahid Sandoghdar
    • , Javier Aizpurua
    • , Zhenchao Dong
    •  & J. G. Hou
  • Letter |

    The findings that the spatial distribution of an optical field with vortex phase profile can be imprinted coherently onto a propagating electron wave reveal new aspects of light–matter interactions and will help develop future single-photon electron spectroscopy.

    • Giovanni De Ninno
    • , Jonas Wätzel
    • , Primož Rebernik Ribič
    • , Enrico Allaria
    • , Marcello Coreno
    • , Miltcho B. Danailov
    • , Christian David
    • , Alexander Demidovich
    • , Michele Di Fraia
    • , Luca Giannessi
    • , Klavs Hansen
    • , Špela Krušič
    • , Michele Manfredda
    • , Michael Meyer
    • , Andrej Mihelič
    • , Najmeh Mirian
    • , Oksana Plekan
    • , Barbara Ressel
    • , Benedikt Rösner
    • , Alberto Simoncig
    • , Simone Spampinati
    • , Matija Stupar
    • , Matjaž Žitnik
    • , Marco Zangrando
    • , Carlo Callegari
    •  & Jamal Berakdar
  • Article |

    A strong Brillouin amplification per unit length, observed in a gas-filled hollow-core fibre, is used to realize a low-threshold continuous-wave single-frequency laser that can in principle operate at any wavelength and to demonstrate distributed temperature sensing with no strain cross-sensitivity.

    • Fan Yang
    • , Flavien Gyger
    •  & Luc Thévenaz
  • Article |

    An organic molecule, 5Cz-TRZ, with multiple donor units supports fast reverse intersystem crossing, allowing fabrication of high-performance organic light-emitting diodes.

    • Lin-Song Cui
    • , Alexander J. Gillett
    • , Shou-Feng Zhang
    • , Hao Ye
    • , Yuan Liu
    • , Xian-Kai Chen
    • , Ze-Sen Lin
    • , Emrys W. Evans
    • , William K. Myers
    • , Tanya K. Ronson
    • , Hajime Nakanotani
    • , Sebastian Reineke
    • , Jean-Luc Bredas
    • , Chihaya Adachi
    •  & Richard H. Friend
  • Author Correction |

    • W. Decking
    • , S. Abeghyan
    • , P. Abramian
    • , A. Abramsky
    • , A. Aguirre
    • , C. Albrecht
    • , P. Alou
    • , M. Altarelli
    • , P. Altmann
    • , K. Amyan
    • , V. Anashin
    • , E. Apostolov
    • , K. Appel
    • , D. Auguste
    • , V. Ayvazyan
    • , S. Baark
    • , F. Babies
    • , N. Baboi
    • , P. Bak
    • , V. Balandin
    • , R. Baldinger
    • , B. Baranasic
    • , S. Barbanotti
    • , O. Belikov
    • , V. Belokurov
    • , L. Belova
    • , V. Belyakov
    • , S. Berry
    • , M. Bertucci
    • , B. Beutner
    • , A. Block
    • , M. Blöcher
    • , T. Böckmann
    • , C. Bohm
    • , M. Böhnert
    • , V. Bondar
    • , E. Bondarchuk
    • , M. Bonezzi
    • , P. Borowiec
    • , C. Bösch
    • , U. Bösenberg
    • , A. Bosotti
    • , R. Böspflug
    • , M. Bousonville
    • , E. Boyd
    • , Y. Bozhko
    • , A. Brand
    • , J. Branlard
    • , S. Briechle
    • , F. Brinker
    • , S. Brinker
    • , R. Brinkmann
    • , S. Brockhauser
    • , O. Brovko
    • , H. Brück
    • , A. Brüdgam
    • , L. Butkowski
    • , T. Büttner
    • , J. Calero
    • , E. Castro-Carballo
    • , G. Cattalanotto
    • , J. Charrier
    • , J. Chen
    • , A. Cherepenko
    • , V. Cheskidov
    • , M. Chiodini
    • , A. Chong
    • , S. Choroba
    • , M. Chorowski
    • , D. Churanov
    • , W. Cichalewski
    • , M. Clausen
    • , W. Clement
    • , C. Cloué
    • , J. A. Cobos
    • , N. Coppola
    • , S. Cunis
    • , K. Czuba
    • , M. Czwalinna
    • , B. D’Almagne
    • , J. Dammann
    • , H. Danared
    • , A. de Zubiaurre Wagner
    • , A. Delfs
    • , T. Delfs
    • , F. Dietrich
    • , T. Dietrich
    • , M. Dohlus
    • , M. Dommach
    • , A. Donat
    • , X. Dong
    • , N. Doynikov
    • , M. Dressel
    • , M. Duda
    • , P. Duda
    • , H. Eckoldt
    • , W. Ehsan
    • , J. Eidam
    • , F. Eints
    • , C. Engling
    • , U. Englisch
    • , A. Ermakov
    • , K. Escherich
    • , J. Eschke
    • , E. Saldin
    • , M. Faesing
    • , A. Fallou
    • , M. Felber
    • , M. Fenner
    • , B. Fernandes
    • , J. M. Fernández
    • , S. Feuker
    • , K. Filippakopoulos
    • , K. Floettmann
    • , V. Fogel
    • , M. Fontaine
    • , A. Francés
    • , I. Freijo Martin
    • , W. Freund
    • , T. Freyermuth
    • , M. Friedland
    • , L. Fröhlich
    • , M. Fusetti
    • , J. Fydrych
    • , A. Gallas
    • , O. García
    • , L. Garcia-Tabares
    • , G. Geloni
    • , N. Gerasimova
    • , C. Gerth
    • , P. Geßler
    • , V. Gharibyan
    • , M. Gloor
    • , J. Głowinkowski
    • , A. Goessel
    • , Z. Gołębiewski
    • , N. Golubeva
    • , W. Grabowski
    • , W. Graeff
    • , A. Grebentsov
    • , M. Grecki
    • , T. Grevsmuehl
    • , M. Gross
    • , U. Grosse-Wortmann
    • , J. Grünert
    • , S. Grunewald
    • , P. Grzegory
    • , G. Feng
    • , H. Guler
    • , G. Gusev
    • , J. L. Gutierrez
    • , L. Hagge
    • , M. Hamberg
    • , R. Hanneken
    • , E. Harms
    • , I. Hartl
    • , A. Hauberg
    • , S. Hauf
    • , J. Hauschildt
    • , J. Hauser
    • , J. Havlicek
    • , A. Hedqvist
    • , N. Heidbrook
    • , F. Hellberg
    • , D. Henning
    • , O. Hensler
    • , T. Hermann
    • , A. Hidvégi
    • , M. Hierholzer
    • , H. Hintz
    • , F. Hoffmann
    • , Markus Hoffmann
    • , Matthias Hoffmann
    • , Y. Holler
    • , M. Hüning
    • , A. Ignatenko
    • , M. Ilchen
    • , A. Iluk
    • , J. Iversen
    • , J. Iversen
    • , M. Izquierdo
    • , L. Jachmann
    • , N. Jardon
    • , U. Jastrow
    • , K. Jensch
    • , J. Jensen
    • , M. Jeżabek
    • , M. Jidda
    • , H. Jin
    • , N. Johansson
    • , R. Jonas
    • , W. Kaabi
    • , D. Kaefer
    • , R. Kammering
    • , H. Kapitza
    • , S. Karabekyan
    • , S. Karstensen
    • , K. Kasprzak
    • , V. Katalev
    • , D. Keese
    • , B. Keil
    • , M. Kholopov
    • , M. Killenberger
    • , B. Kitaev
    • , Y. Klimchenko
    • , R. Klos
    • , L. Knebel
    • , A. Koch
    • , M. Koepke
    • , S. Köhler
    • , W. Köhler
    • , N. Kohlstrunk
    • , Z. Konopkova
    • , A. Konstantinov
    • , W. Kook
    • , W. Koprek
    • , M. Körfer
    • , O. Korth
    • , A. Kosarev
    • , K. Kosiński
    • , D. Kostin
    • , Y. Kot
    • , A. Kotarba
    • , T. Kozak
    • , V. Kozak
    • , R. Kramert
    • , M. Krasilnikov
    • , A. Krasnov
    • , B. Krause
    • , L. Kravchuk
    • , O. Krebs
    • , R. Kretschmer
    • , J. Kreutzkamp
    • , O. Kröplin
    • , K. Krzysik
    • , G. Kube
    • , H. Kuehn
    • , N. Kujala
    • , V. Kulikov
    • , V. Kuzminych
    • , D. La Civita
    • , M. Lacroix
    • , T. Lamb
    • , A. Lancetov
    • , M. Larsson
    • , D. Le Pinvidic
    • , S. Lederer
    • , T. Lensch
    • , D. Lenz
    • , A. Leuschner
    • , F. Levenhagen
    • , Y. Li
    • , J. Liebing
    • , L. Lilje
    • , T. Limberg
    • , D. Lipka
    • , B. List
    • , J. Liu
    • , S. Liu
    • , B. Lorbeer
    • , J. Lorkiewicz
    • , H. H. Lu
    • , F. Ludwig
    • , K. Machau
    • , W. Maciocha
    • , C. Madec
    • , C. Magueur
    • , C. Maiano
    • , I. Maksimova
    • , K. Malcher
    • , T. Maltezopoulos
    • , E. Mamoshkina
    • , B. Manschwetus
    • , F. Marcellini
    • , G. Marinkovic
    • , T. Martinez
    • , H. Martirosyan
    • , W. Maschmann
    • , M. Maslov
    • , A. Matheisen
    • , U. Mavric
    • , J. Meißner
    • , K. Meissner
    • , M. Messerschmidt
    • , N. Meyners
    • , G. Michalski
    • , P. Michelato
    • , N. Mildner
    • , M. Moe
    • , F. Moglia
    • , C. Mohr
    • , S. Mohr
    • , W. Möller
    • , M. Mommerz
    • , L. Monaco
    • , C. Montiel
    • , M. Moretti
    • , I. Morozov
    • , P. Morozov
    • , D. Mross
    • , J. Mueller
    • , C. Müller
    • , J. Müller
    • , K. Müller
    • , J. Munilla
    • , A. Münnich
    • , V. Muratov
    • , O. Napoly
    • , B. Näser
    • , N. Nefedov
    • , Reinhard Neumann
    • , Rudolf Neumann
    • , N. Ngada
    • , D. Noelle
    • , F. Obier
    • , I. Okunev
    • , J. A. Oliver
    • , M. Omet
    • , A. Oppelt
    • , A. Ottmar
    • , M. Oublaid
    • , C. Pagani
    • , R. Paparella
    • , V. Paramonov
    • , C. Peitzmann
    • , J. Penning
    • , A. Perus
    • , F. Peters
    • , B. Petersen
    • , A. Petrov
    • , I. Petrov
    • , S. Pfeiffer
    • , J. Pflüger
    • , S. Philipp
    • , Y. Pienaud
    • , P. Pierini
    • , S. Pivovarov
    • , M. Planas
    • , E. Pławski
    • , M. Pohl
    • , J. Polinski
    • , V. Popov
    • , S. Prat
    • , J. Prenting
    • , G. Priebe
    • , H. Pryschelski
    • , K. Przygoda
    • , E. Pyata
    • , B. Racky
    • , A. Rathjen
    • , W. Ratuschni
    • , S. Regnaud-Campderros
    • , K. Rehlich
    • , D. Reschke
    • , C. Robson
    • , J. Roever
    • , M. Roggli
    • , J. Rothenburg
    • , E. Rusiński
    • , R. Rybaniec
    • , H. Sahling
    • , M. Salmani
    • , L. Samoylova
    • , D. Sanzone
    • , F. Saretzki
    • , O. Sawlanski
    • , J. Schaffran
    • , H. Schlarb
    • , M. Schlösser
    • , V. Schlott
    • , C. Schmidt
    • , F. Schmidt-Foehre
    • , M. Schmitz
    • , M. Schmökel
    • , T. Schnautz
    • , E. Schneidmiller
    • , M. Scholz
    • , B. Schöneburg
    • , J. Schultze
    • , C. Schulz
    • , A. Schwarz
    • , J. Sekutowicz
    • , D. Sellmann
    • , E. Semenov
    • , S. Serkez
    • , D. Sertore
    • , N. Shehzad
    • , P. Shemarykin
    • , L. Shi
    • , M. Sienkiewicz
    • , D. Sikora
    • , M. Sikorski
    • , A. Silenzi
    • , C. Simon
    • , W. Singer
    • , X. Singer
    • , H. Sinn
    • , K. Sinram
    • , N. Skvorodnev
    • , P. Smirnow
    • , T. Sommer
    • , A. Sorokin
    • , M. Stadler
    • , M. Steckel
    • , B. Steffen
    • , N. Steinhau-Kühl
    • , F. Stephan
    • , M. Stodulski
    • , M. Stolper
    • , A. Sulimov
    • , R. Susen
    • , J. Świerblewski
    • , C. Sydlo
    • , E. Syresin
    • , V. Sytchev
    • , J. Szuba
    • , N. Tesch
    • , J. Thie
    • , A. Thiebault
    • , K. Tiedtke
    • , D. Tischhauser
    • , J. Tolkiehn
    • , S. Tomin
    • , F. Tonisch
    • , F. Toral
    • , I. Torbin
    • , A. Trapp
    • , D. Treyer
    • , G. Trowitzsch
    • , T. Trublet
    • , T. Tschentscher
    • , F. Ullrich
    • , M. Vannoni
    • , P. Varela
    • , G. Varghese
    • , G. Vashchenko
    • , M. Vasic
    • , C. Vazquez-Velez
    • , A. Verguet
    • , S. Vilcins-Czvitkovits
    • , R. Villanueva
    • , B. Visentin
    • , M. Viti
    • , E. Vogel
    • , E. Volobuev
    • , R. Wagner
    • , N. Walker
    • , T. Wamsat
    • , H. Weddig
    • , G. Weichert
    • , H. Weise
    • , R. Wenndorf
    • , M. Werner
    • , R. Wichmann
    • , C. Wiebers
    • , M. Wiencek
    • , T. Wilksen
    • , I. Will
    • , L. Winkelmann
    • , M. Winkowski
    • , K. Wittenburg
    • , A. Witzig
    • , P. Wlk
    • , T. Wohlenberg
    • , M. Wojciechowski
    • , F. Wolff-Fabris
    • , G. Wrochna
    • , K. Wrona
    • , M. Yakopov
    • , B. Yang
    • , F. Yang
    • , M. Yurkov
    • , I. Zagorodnov
    • , P. Zalden
    • , A. Zavadtsev
    • , D. Zavadtsev
    • , A. Zhirnov
    • , A. Zhukov
    • , V. Ziemann
    • , A. Zolotov
    • , N. Zolotukhina
    • , F. Zummack
    •  & D. Zybin
  • Letter |

    Gold atoms were stripped of up to 72 electrons by irradiating gold foils and nanowire arrays with a relativistic 400 nm laser pulse. This work will open the door to the study of the atomic physics of highly charged atoms in very-high-density plasmas.

    • R. Hollinger
    • , S. Wang
    • , Y. Wang
    • , A. Moreau
    • , M. G. Capeluto
    • , H. Song
    • , A. Rockwood
    • , E. Bayarsaikhan
    • , V. Kaymak
    • , A. Pukhov
    • , V. N. Shlyaptsev
    •  & J. J. Rocca
  • Article |

    Coherent diffractive imaging using broadband illumination is demonstrated at visible and X-ray wavelengths. The method is based on a numerical monochromatization of the broadband diffraction pattern by the regularized inversion of a matrix.

    • Julius Huijts
    • , Sara Fernandez
    • , David Gauthier
    • , Maria Kholodtsova
    • , Ahmed Maghraoui
    • , Kadda Medjoubi
    • , Andrea Somogyi
    • , Willem Boutu
    •  & Hamed Merdji
  • Article |

    Photochemical upconversion of light with photon energy below the silicon bandgap has remained elusive, but the feat has now been demonstrated using PbS semiconductor nanocrystals and violanthrone.

    • Elham M. Gholizadeh
    • , Shyamal K. K. Prasad
    • , Zhi Li Teh
    • , Thilini Ishwara
    • , Sarah Norman
    • , Anthony J. Petty II
    • , Jared H. Cole
    • , Soshan Cheong
    • , Richard D. Tilley
    • , John E. Anthony
    • , Shujuan Huang
    •  & Timothy W. Schmidt
  • Article |

    Optical waveforms with a 1.7 octave spectrum and 0.6 optical cycle duration are generated at a central wavelength of 1.4 μm by parametric waveform synthesis. The output pulse energies amount to >500 μJ with fluctuations of 1% r.m.s. over 1,000 shots.

    • Giulio Maria Rossi
    • , Roland E. Mainz
    • , Yudong Yang
    • , Fabian Scheiba
    • , Miguel A. Silva-Toledo
    • , Shih-Hsuan Chia
    • , Phillip D. Keathley
    • , Shaobo Fang
    • , Oliver D. Mücke
    • , Cristian Manzoni
    • , Giulio Cerullo
    • , Giovanni Cirmi
    •  & Franz X. Kärtner
  • Article |

    Pt(ii) complexes allow the fabrication of efficient near-infrared organic light-emitting diodes that operate beyond the 900 nm region.

    • Yu-Chen Wei
    • , Sheng Fu Wang
    • , Yun Hu
    • , Liang-Sheng Liao
    • , Deng-Gao Chen
    • , Kai-Hsin Chang
    • , Chi-Wei Wang
    • , Shih-Hung Liu
    • , Wei-Hsiang Chan
    • , Jia-Ling Liao
    • , Wen-Yi Hung
    • , Tsai-Hui Wang
    • , Po-Ting Chen
    • , Hsiu-Fu Hsu
    • , Yun Chi
    •  & Pi-Tai Chou
  • Letter |

    Observations of decoherence from thermodynamic noise in microresonator soliton frequency combs and laser cooling that reduces soliton thermal decoherence to far below the ambient-temperature limit are described, linking nonlinear photonics and microscopic fluctuations.

    • Tara E. Drake
    • , Jordan R. Stone
    • , Travis C. Briles
    •  & Scott B. Papp
  • Article |

    A strain-induced absorption-enhanced MoTe2-based silicon photonic microring-integrated photodetector is demonstrated, featuring high responsivity of ~0.5 A W–1 at 1,550 nm, with a low noise-equivalent power of 90 pW Hz–0.5.

    • R. Maiti
    • , C. Patil
    • , M. A. S. R. Saadi
    • , T. Xie
    • , J. G. Azadani
    • , B. Uluutku
    • , R. Amin
    • , A. F. Briggs
    • , M. Miscuglio
    • , D. Van Thourhout
    • , S. D. Solares
    • , T. Low
    • , R. Agarwal
    • , S. R. Bank
    •  & V. J. Sorger
  • Letter |

    An appropriately designed pulsed beam crossing an interface is shown to enable phenomena including anomalous group-velocity increase in higher-index materials, and tunable group velocity by varying the angle of incidence.

    • Basanta Bhaduri
    • , Murat Yessenov
    •  & Ayman F. Abouraddy
  • Article |

    The incorporation of microsphere lasers into heart cells allows all-optical recording of cardiac contraction with cellular resolution. [This summary has been amended from ‘microdisk’ to ‘microsphere’ lasers.]

    • Marcel Schubert
    • , Lewis Woolfson
    • , Isla R. M. Barnard
    • , Amy M. Dorward
    • , Becky Casement
    • , Andrew Morton
    • , Gavin B. Robertson
    • , Paul L. Appleton
    • , Gareth B. Miles
    • , Carl S. Tucker
    • , Samantha J. Pitt
    •  & Malte C. Gather
  • Letter |

    Owing to the superlattice-induced bandgap and superlattice-enhanced density of states, small-twist-angled (<2°) bilayer graphene exhibits a strong gate-tunable photoresponse in the mid-infrared regime of 5 to 12 μm, reaching an extrinsic peak responsivity of 26 mA W−1 at 12 μm.

    • Bingchen Deng
    • , Chao Ma
    • , Qiyue Wang
    • , Shaofan Yuan
    • , Kenji Watanabe
    • , Takashi Taniguchi
    • , Fan Zhang
    •  & Fengnian Xia
  • Letter |

    Exploiting two-dimensional metamaterials, the direction of emission from InGaN/GaN quantum wells is engineered while simultaneously improving quantum efficiency.

    • Prasad P. Iyer
    • , Ryan A. DeCrescent
    • , Yahya Mohtashami
    • , Guillaume Lheureux
    • , Nikita A. Butakov
    • , Abdullah Alhassan
    • , Claude Weisbuch
    • , Shuji Nakamura
    • , Steven P. DenBaars
    •  & Jon. A. Schuller
  • Article |

    A tomographiac approach to second-harmonic-generation imaging on nonlinear structures is demonstrated, with experiments and three-dimensional reconstructions on a beta-barium borate crystal and various biological specimens performed.

    • Chenfei Hu
    • , Jeffrey J. Field
    • , Varun Kelkar
    • , Benny Chiang
    • , Keith Wernsing
    • , Kimani C. Toussaint
    • , Randy A. Bartels
    •  & Gabriel Popescu
  • Article |

    By suppressing the second- and third-order intracavity dispersion using an intracavity spectral pulse shaper, a mode-locked laser that emits pure-quartic soliton pulses that arise from the interaction of the fourth-order dispersion and the Kerr nonlinearity is demonstrated.

    • Antoine F. J. Runge
    • , Darren D. Hudson
    • , Kevin K. K. Tam
    • , C. Martijn de Sterke
    •  & Andrea Blanco-Redondo
  • Article |

    The first operation of the European X-ray free-electron laser facility accelerator based on superconducting technology is reported. The maximum electron energy is 17.5 GeV. A laser average power of 6 W is achieved at a photon energy of 9.3 keV.

    • W. Decking
    • , S. Abeghyan
    • , P. Abramian
    • , A. Abramsky
    • , A. Aguirre
    • , C. Albrecht
    • , P. Alou
    • , M. Altarelli
    • , P. Altmann
    • , K. Amyan
    • , V. Anashin
    • , E. Apostolov
    • , K. Appel
    • , D. Auguste
    • , V. Ayvazyan
    • , S. Baark
    • , F. Babies
    • , N. Baboi
    • , P. Bak
    • , V. Balandin
    • , R. Baldinger
    • , B. Baranasic
    • , S. Barbanotti
    • , O. Belikov
    • , V. Belokurov
    • , L. Belova
    • , V. Belyakov
    • , S. Berry
    • , M. Bertucci
    • , B. Beutner
    • , A. Block
    • , M. Blöcher
    • , T. Böckmann
    • , C. Bohm
    • , M. Böhnert
    • , V. Bondar
    • , E. Bondarchuk
    • , M. Bonezzi
    • , P. Borowiec
    • , C. Bösch
    • , U. Bösenberg
    • , A. Bosotti
    • , R. Böspflug
    • , M. Bousonville
    • , E. Boyd
    • , Y. Bozhko
    • , A. Brand
    • , J. Branlard
    • , S. Briechle
    • , F. Brinker
    • , S. Brinker
    • , R. Brinkmann
    • , S. Brockhauser
    • , O. Brovko
    • , H. Brück
    • , A. Brüdgam
    • , L. Butkowski
    • , T. Büttner
    • , J. Calero
    • , E. Castro-Carballo
    • , G. Cattalanotto
    • , J. Charrier
    • , J. Chen
    • , A. Cherepenko
    • , V. Cheskidov
    • , M. Chiodini
    • , A. Chong
    • , S. Choroba
    • , M. Chorowski
    • , D. Churanov
    • , W. Cichalewski
    • , M. Clausen
    • , W. Clement
    • , C. Cloué
    • , J. A. Cobos
    • , N. Coppola
    • , S. Cunis
    • , K. Czuba
    • , M. Czwalinna
    • , B. D’Almagne
    • , J. Dammann
    • , H. Danared
    • , A. de Zubiaurre Wagner
    • , A. Delfs
    • , T. Delfs
    • , F. Dietrich
    • , T. Dietrich
    • , M. Dohlus
    • , M. Dommach
    • , A. Donat
    • , X. Dong
    • , N. Doynikov
    • , M. Dressel
    • , M. Duda
    • , P. Duda
    • , H. Eckoldt
    • , W. Ehsan
    • , J. Eidam
    • , F. Eints
    • , C. Engling
    • , U. Englisch
    • , A. Ermakov
    • , K. Escherich
    • , J. Eschke
    • , E. Saldin
    • , M. Faesing
    • , A. Fallou
    • , M. Felber
    • , M. Fenner
    • , B. Fernandes
    • , J. M. Fernández
    • , S. Feuker
    • , K. Filippakopoulos
    • , K. Floettmann
    • , V. Fogel
    • , M. Fontaine
    • , A. Francés
    • , I. Freijo Martin
    • , W. Freund
    • , T. Freyermuth
    • , M. Friedland
    • , L. Fröhlich
    • , M. Fusetti
    • , J. Fydrych
    • , A. Gallas
    • , O. García
    • , L. Garcia-Tabares
    • , G. Geloni
    • , N. Gerasimova
    • , C. Gerth
    • , P. Geßler
    • , V. Gharibyan
    • , M. Gloor
    • , J. Głowinkowski
    • , A. Goessel
    • , Z. Gołębiewski
    • , N. Golubeva
    • , W. Grabowski
    • , W. Graeff
    • , A. Grebentsov
    • , M. Grecki
    • , T. Grevsmuehl
    • , M. Gross
    • , U. Grosse-Wortmann
    • , J. Grünert
    • , S. Grunewald
    • , P. Grzegory
    • , G. Feng
    • , H. Guler
    • , G. Gusev
    • , J. L. Gutierrez
    • , L. Hagge
    • , M. Hamberg
    • , R. Hanneken
    • , E. Harms
    • , I. Hartl
    • , A. Hauberg
    • , S. Hauf
    • , J. Hauschildt
    • , J. Hauser
    • , J. Havlicek
    • , A. Hedqvist
    • , N. Heidbrook
    • , F. Hellberg
    • , D. Henning
    • , O. Hensler
    • , T. Hermann
    • , A. Hidvégi
    • , M. Hierholzer
    • , H. Hintz
    • , F. Hoffmann
    • , Markus Hoffmann
    • , Matthias Hoffmann
    • , Y. Holler
    • , M. Hüning
    • , A. Ignatenko
    • , M. Ilchen
    • , A. Iluk
    • , J. Iversen
    • , J. Iversen
    • , M. Izquierdo
    • , L. Jachmann
    • , N. Jardon
    • , U. Jastrow
    • , K. Jensch
    • , J. Jensen
    • , M. Jeżabek
    • , M. Jidda
    • , H. Jin
    • , N. Johansson
    • , R. Jonas
    • , W. Kaabi
    • , D. Kaefer
    • , R. Kammering
    • , H. Kapitza
    • , S. Karabekyan
    • , S. Karstensen
    • , K. Kasprzak
    • , V. Katalev
    • , D. Keese
    • , B. Keil
    • , M. Kholopov
    • , M. Killenberger
    • , B. Kitaev
    • , Y. Klimchenko
    • , R. Klos
    • , L. Knebel
    • , A. Koch
    • , M. Koepke
    • , S. Köhler
    • , W. Köhler
    • , N. Kohlstrunk
    • , Z. Konopkova
    • , A. Konstantinov
    • , W. Kook
    • , W. Koprek
    • , M. Körfer
    • , O. Korth
    • , A. Kosarev
    • , K. Kosiński
    • , D. Kostin
    • , Y. Kot
    • , A. Kotarba
    • , T. Kozak
    • , V. Kozak
    • , R. Kramert
    • , M. Krasilnikov
    • , A. Krasnov
    • , B. Krause
    • , L. Kravchuk
    • , O. Krebs
    • , R. Kretschmer
    • , J. Kreutzkamp
    • , O. Kröplin
    • , K. Krzysik
    • , G. Kube
    • , H. Kuehn
    • , N. Kujala
    • , V. Kulikov
    • , V. Kuzminych
    • , D. La Civita
    • , M. Lacroix
    • , T. Lamb
    • , A. Lancetov
    • , M. Larsson
    • , D. Le Pinvidic
    • , S. Lederer
    • , T. Lensch
    • , D. Lenz
    • , A. Leuschner
    • , F. Levenhagen
    • , Y. Li
    • , J. Liebing
    • , L. Lilje
    • , T. Limberg
    • , D. Lipka
    • , B. List
    • , J. Liu
    • , S. Liu
    • , B. Lorbeer
    • , J. Lorkiewicz
    • , H. H. Lu
    • , F. Ludwig
    • , K. Machau
    • , W. Maciocha
    • , C. Madec
    • , C. Magueur
    • , C. Maiano
    • , I. Maksimova
    • , K. Malcher
    • , T. Maltezopoulos
    • , E. Mamoshkina
    • , B. Manschwetus
    • , F. Marcellini
    • , G. Marinkovic
    • , T. Martinez
    • , H. Martirosyan
    • , W. Maschmann
    • , M. Maslov
    • , A. Matheisen
    • , U. Mavric
    • , J. Meißner
    • , K. Meissner
    • , M. Messerschmidt
    • , N. Meyners
    • , G. Michalski
    • , P. Michelato
    • , N. Mildner
    • , M. Moe
    • , F. Moglia
    • , C. Mohr
    • , S. Mohr
    • , W. Möller
    • , M. Mommerz
    • , L. Monaco
    • , C. Montiel
    • , M. Moretti
    • , I. Morozov
    • , P. Morozov
    • , D. Mross
    • , J. Mueller
    • , C. Müller
    • , J. Müller
    • , K. Müller
    • , J. Munilla
    • , A. Münnich
    • , V. Muratov
    • , O. Napoly
    • , B. Näser
    • , N. Nefedov
    • , Reinhard Neumann
    • , Rudolf Neumann
    • , N. Ngada
    • , D. Noelle
    • , F. Obier
    • , I. Okunev
    • , J. A. Oliver
    • , M. Omet
    • , A. Oppelt
    • , A. Ottmar
    • , M. Oublaid
    • , C. Pagani
    • , R. Paparella
    • , V. Paramonov
    • , C. Peitzmann
    • , J. Penning
    • , A. Perus
    • , F. Peters
    • , B. Petersen
    • , A. Petrov
    • , I. Petrov
    • , S. Pfeiffer
    • , J. Pflüger
    • , S. Philipp
    • , Y. Pienaud
    • , P. Pierini
    • , S. Pivovarov
    • , M. Planas
    • , E. Pławski
    • , M. Pohl
    • , J. Polinski
    • , V. Popov
    • , S. Prat
    • , J. Prenting
    • , G. Priebe
    • , H. Pryschelski
    • , K. Przygoda
    • , E. Pyata
    • , B. Racky
    • , A. Rathjen
    • , W. Ratuschni
    • , S. Regnaud-Campderros
    • , K. Rehlich
    • , D. Reschke
    • , C. Robson
    • , J. Roever
    • , M. Roggli
    • , J. Rothenburg
    • , E. Rusiński
    • , R. Rybaniec
    • , H. Sahling
    • , M. Salmani
    • , L. Samoylova
    • , D. Sanzone
    • , F. Saretzki
    • , O. Sawlanski
    • , J. Schaffran
    • , H. Schlarb
    • , M. Schlösser
    • , V. Schlott
    • , C. Schmidt
    • , F. Schmidt-Foehre
    • , M. Schmitz
    • , M. Schmökel
    • , T. Schnautz
    • , E. Schneidmiller
    • , M. Scholz
    • , B. Schöneburg
    • , J. Schultze
    • , C. Schulz
    • , A. Schwarz
    • , J. Sekutowicz
    • , D. Sellmann
    • , E. Semenov
    • , S. Serkez
    • , D. Sertore
    • , N. Shehzad
    • , P. Shemarykin
    • , L. Shi
    • , M. Sienkiewicz
    • , D. Sikora
    • , M. Sikorski
    • , A. Silenzi
    • , C. Simon
    • , W. Singer
    • , X. Singer
    • , H. Sinn
    • , K. Sinram
    • , N. Skvorodnev
    • , P. Smirnow
    • , T. Sommer
    • , A. Sorokin
    • , M. Stadler
    • , M. Steckel
    • , B. Steffen
    • , N. Steinhau-Kühl
    • , F. Stephan
    • , M. Stodulski
    • , M. Stolper
    • , A. Sulimov
    • , R. Susen
    • , J. Świerblewski
    • , C. Sydlo
    • , E. Syresin
    • , V. Sytchev
    • , J. Szuba
    • , N. Tesch
    • , J. Thie
    • , A. Thiebault
    • , K. Tiedtke
    • , D. Tischhauser
    • , J. Tolkiehn
    • , S. Tomin
    • , F. Tonisch
    • , F. Toral
    • , I. Torbin
    • , A. Trapp
    • , D. Treyer
    • , G. Trowitzsch
    • , T. Trublet
    • , T. Tschentscher
    • , F. Ullrich
    • , M. Vannoni
    • , P. Varela
    • , G. Varghese
    • , G. Vashchenko
    • , M. Vasic
    • , C. Vazquez-Velez
    • , A. Verguet
    • , S. Vilcins-Czvitkovits
    • , R. Villanueva
    • , B. Visentin
    • , M. Viti
    • , E. Vogel
    • , E. Volobuev
    • , R. Wagner
    • , N. Walker
    • , T. Wamsat
    • , H. Weddig
    • , G. Weichert
    • , H. Weise
    • , R. Wenndorf
    • , M. Werner
    • , R. Wichmann
    • , C. Wiebers
    • , M. Wiencek
    • , T. Wilksen
    • , I. Will
    • , L. Winkelmann
    • , M. Winkowski
    • , K. Wittenburg
    • , A. Witzig
    • , P. Wlk
    • , T. Wohlenberg
    • , M. Wojciechowski
    • , F. Wolff-Fabris
    • , G. Wrochna
    • , K. Wrona
    • , M. Yakopov
    • , B. Yang
    • , F. Yang
    • , M. Yurkov
    • , I. Zagorodnov
    • , P. Zalden
    • , A. Zavadtsev
    • , D. Zavadtsev
    • , A. Zhirnov
    • , A. Zhukov
    • , V. Ziemann
    • , A. Zolotov
    • , N. Zolotukhina
    • , F. Zummack
    •  & D. Zybin
  • Article |

    Carefully designed hollow-core antiresonant fibres support a pair of orthogonal polarization modes with a level of purity and cross-coupling that is orders of magnitude lower than other fibre designs and beyond the fundamental Rayleigh scattering limit of glass core fibres.

    • A. Taranta
    • , E. Numkam Fokoua
    • , S. Abokhamis Mousavi
    • , J. R. Hayes
    • , T. D. Bradley
    • , G. T. Jasion
    •  & F. Poletti
  • Article |

    The use of a photonic integrated circuit to both hold a biological sample and generate the necessary light patterns for structured illumination microscopy promises convenient super-resolution imaging.

    • Øystein Ivar Helle
    • , Firehun Tsige Dullo
    • , Marcel Lahrberg
    • , Jean-Claude Tinguely
    • , Olav Gaute Hellesø
    •  & Balpreet Singh Ahluwalia
  • Article |

    Combining the advantages of ultrasound and light for fluorescence imaging, an imaging technique termed fluorescence and ultrasound-modulated light correlation, or FLUX, that leverages the dynamic nature of the medium is reported to uniquely resolve fluorophore distribution even when the speckles decorrelate fast.

    • Haowen Ruan
    • , Yan Liu
    • , Jian Xu
    • , Yujia Huang
    •  & Changhuei Yang
  • Article |

    A metasurface laser generates orbital angular momentum states with quantum numbers reaching  = 100. Simultaneous output vortex beams, with Δ as great as 90, are demonstrated in the visible regime.

    • Hend Sroor
    • , Yao-Wei Huang
    • , Bereneice Sephton
    • , Darryl Naidoo
    • , Adam Vallés
    • , Vincent Ginis
    • , Cheng-Wei Qiu
    • , Antonio Ambrosio
    • , Federico Capasso
    •  & Andrew Forbes
  • Article |

    By harnessing the excitonic resonances of a monolayer of WS2 in the visible spectral range, large-area, actively tunable and atomically thin optical lenses can be realized.

    • Jorik van de Groep
    • , Jung-Hwan Song
    • , Umberto Celano
    • , Qitong Li
    • , Pieter G. Kik
    •  & Mark L. Brongersma
  • Article |

    Nanophotonic microwave synthesizers in the X-band (10 GHz, for radar) and K-band (20 GHz, for 5G), based on integrated soliton microcombs driven by a low-noise fibre laser, link the fields of microwave photonics and integrated microcombs.

    • Junqiu Liu
    • , Erwan Lucas
    • , Arslan S. Raja
    • , Jijun He
    • , Johann Riemensberger
    • , Rui Ning Wang
    • , Maxim Karpov
    • , Hairun Guo
    • , Romain Bouchand
    •  & Tobias J. Kippenberg
  • Article |

    Robust terahertz wave transport is demonstrated on a silicon chip using the valley Hall topological phase. Error-free communication is achieved at a data rate of 11 Gbit s−1, enabling real-time transmission of uncompressed 4K high-definition video.

    • Yihao Yang
    • , Yuichiro Yamagami
    • , Xiongbin Yu
    • , Prakash Pitchappa
    • , Julian Webber
    • , Baile Zhang
    • , Masayuki Fujita
    • , Tadao Nagatsuma
    •  & Ranjan Singh
  • Review Article |

    The Review summarizes the progress of hybrid quantum photonics integration in terms of its important design considerations and fabrication approaches, and highlights some successful realizations of key physical resources for building integrated quantum devices, such as quantum teleporters, quantum repeaters and quantum simulators.

    • Ali W. Elshaari
    • , Wolfram Pernice
    • , Kartik Srinivasan
    • , Oliver Benson
    •  & Val Zwiller
  • Letter |

    A pair of transportable optical lattice clocks with 10−18 uncertainty is developed. The relativistic redshift predicted by the theory of general relativity has been tested at the 10–5 level by the two optical clocks with a height difference of 450 m on the ground.

    • Masao Takamoto
    • , Ichiro Ushijima
    • , Noriaki Ohmae
    • , Toshihiro Yahagi
    • , Kensuke Kokado
    • , Hisaaki Shinkai
    •  & Hidetoshi Katori