Latest Research

  • 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
  • Letter |

    Double-blind holography allows reconstruction of the missing spectral phases and characterization of the unknown signals in both isolated-pulse and double-pulse scenarios, facilitating the study of complex electron dynamics via a single-shot and linear measurement.

    • O. Pedatzur
    • , A. Trabattoni
    • , B. Leshem
    • , H. Shalmoni
    • , M. C. Castrovilli
    • , M. Galli
    • , M. Lucchini
    • , E. Månsson
    • , F. Frassetto
    • , L. Poletto
    • , B. Nadler
    • , O. Raz
    • , M. Nisoli
    • , F. Calegari
    • , D. Oron
    •  & N. Dudovich
  • Review Article |

    This Review discusses recent advances of microwave photonic technologies and their applications in communications and information processing, as well as their potential implementations in quantum and neuromorphic photonics.

    • David Marpaung
    • , Jianping Yao
    •  & José Capmany
  • Letter |

    Temporal dissipative soliton formation in a free-space femtosecond enhancement cavity with a thin Kerr medium is reported. Locking a 350-fs, 1,035-nm pulse train with a repetition rate of 100 MHz to this cavity-soliton state generates a 37-fs sech2-shaped pulse with a peak-power enhancement of 3,200.

    • N. Lilienfein
    • , C. Hofer
    • , M. Högner
    • , T. Saule
    • , M. Trubetskov
    • , V. Pervak
    • , E. Fill
    • , C. Riek
    • , A. Leitenstorfer
    • , J. Limpert
    • , F. Krausz
    •  & I. Pupeza
  • Letter |

    The entanglement of three remote quantum memories based on 87Rb atoms is created via three-photon interference by enhancing the memory–photon entanglement in ring cavities, demonstrating a genuine quantum network involving more than two quantum nodes.

    • Bo Jing
    • , Xu-Jie Wang
    • , Yong Yu
    • , Peng-Fei Sun
    • , Yan Jiang
    • , Sheng-Jun Yang
    • , Wen-Hao Jiang
    • , Xi-Yu Luo
    • , Jun Zhang
    • , Xiao Jiang
    • , Xiao-Hui Bao
    •  & Jian-Wei Pan
  • 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
  • Letter |

    Direct laser writing is shown to dramatically enhance the chemical etch rate of laser crystals yttrium aluminium garnet and sapphire, allowing nanostructuring.

    • Airán Ródenas
    • , Min Gu
    • , Giacomo Corrielli
    • , Petra Paiè
    • , Sajeev John
    • , Ajoy K. Kar
    •  & Roberto Osellame
  • 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
  • Letter |

    An interferometric homodyne method is employed to measure material-dependent intensity-induced phase shifts of extreme-ultraviolet high harmonics emerging from bulk magnesium oxide and quartz crystals, providing a robust platform for high-harmonic spectroscopy of solids.

    • Jian Lu
    • , Eric F. Cunningham
    • , Yong Sing You
    • , David A. Reis
    •  & Shambhu Ghimire
  • Letter |

    Coupled lithium niobate ring resonators enable control of a ‘photonic molecule’ by programmed microwave signals. An on-demand optical storage and retrieval system is demonstrated.

    • Mian Zhang
    • , Cheng Wang
    • , Yaowen Hu
    • , Amirhassan Shams-Ansari
    • , Tianhao Ren
    • , Shanhui Fan
    •  & Marko Lončar
  • 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
  • Letter |

    A microphotonic astrocomb is demonstrated via temporal dissipative Kerr solitons in photonic-chip-based silicon nitride microresonators with a precision of 25 cm s–1 (radial velocity equivalent), useful for Earth-like planet detection and cosmological research.

    • Ewelina Obrzud
    • , Monica Rainer
    • , Avet Harutyunyan
    • , Miles H. Anderson
    • , Junqiu Liu
    • , Michael Geiselmann
    • , Bruno Chazelas
    • , Stefan Kundermann
    • , Steve Lecomte
    • , Massimo Cecconi
    • , Adriano Ghedina
    • , Emilio Molinari
    • , Francesco Pepe
    • , François Wildi
    • , François Bouchy
    • , Tobias J. Kippenberg
    •  & Tobias Herr
  • Letter |

    A soliton microcomb as an astronomical spectrograph calibrator is presented. It can ultimately have a footprint of a few cubic centimetres, and reduced weight and power consumption, attractive for precision radial velocity measurement.

    • Myoung-Gyun Suh
    • , Xu Yi
    • , Yu-Hung Lai
    • , S. Leifer
    • , Ivan S. Grudinin
    • , G. Vasisht
    • , Emily C. Martin
    • , Michael P. Fitzgerald
    • , G. Doppmann
    • , J. Wang
    • , D. Mawet
    • , Scott B. Papp
    • , Scott A. Diddams
    • , C. Beichman
    •  & Kerry Vahala
  • 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
  • Letter |

    Quantum cascade laser frequency combs are coherently locked to an external radio-frequency source even in extremely high-feedback conditions. The internal phase-locking mechanism and the possibility of all-electric stabilization are investigated.

    • Johannes Hillbrand
    • , Aaron Maxwell Andrews
    • , Hermann Detz
    • , Gottfried Strasser
    •  & Benedikt Schwarz
  • 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
  • Article |

    Five wire lasers are phase-locked by a strong coupling and form a coupled cavity. The lasing frequency is around 3.8 THz and is continuously tunable by 10 GHz. A continuous-wave output power of 50–90 mW and beam divergence of 10° are achieved.

    • Ali Khalatpour
    • , John L. Reno
    •  & Qing Hu
  • Review Article |

    Rather than requiring millions of pixels, it is possible to make a camera that only needs one pixel. This Review details the working principle, advantages, technical considerations and future potential of single-pixel imaging.

    • Matthew P. Edgar
    • , Graham M. Gibson
    •  & Miles J. Padgett
  • Article |

    The absolute phase difference of the harmonic emission of Ar, Ne and He atoms is measured by XUV interferometry with temporal resolution of 6 as. This measurement provides a direct insight into the quantum properties of the photoelectron wavefunctions.

    • Doron Azoury
    • , Omer Kneller
    • , Shaked Rozen
    • , Barry D. Bruner
    • , Alex Clergerie
    • , Yann Mairesse
    • , Baptiste Fabre
    • , Bernard Pons
    • , Nirit Dudovich
    •  & Michael Krüger
  • Review Article |

    This Review discusses emerging applications of photonic quantum sensing. The theoretical and experimental developments of quantum reading of classical data, quantum illumination of targets, and optical resolution beyond the Rayleigh limit are described.

    • S. Pirandola
    • , B. R. Bardhan
    • , T. Gehring
    • , C. Weedbrook
    •  & S. Lloyd
  • Letter |

    A second harmonic with a conversion efficiency of 0.049% W−1, originating from surface nonlinearity and bulk multipole response in a silica whispering-gallery microcavity, is observed with a continuous-wave pump power below 1 mW.

    • Xueyue Zhang
    • , Qi-Tao Cao
    • , Zhuo Wang
    • , Yu-xi Liu
    • , Cheng-Wei Qiu
    • , Lan Yang
    • , Qihuang Gong
    •  & Yun-Feng Xiao
  • Article |

    Near-infrared perovskite–polymer light-emitting diodes (LEDs) with external quantum efficiencies of up to 20.1% are reported.

    • Baodan Zhao
    • , Sai Bai
    • , Vincent Kim
    • , Robin Lamboll
    • , Ravichandran Shivanna
    • , Florian Auras
    • , Johannes M. Richter
    • , Le Yang
    • , Linjie Dai
    • , Mejd Alsari
    • , Xiao-Jian She
    • , Lusheng Liang
    • , Jiangbin Zhang
    • , Samuele Lilliu
    • , Peng Gao
    • , Henry J. Snaith
    • , Jianpu Wang
    • , Neil C. Greenham
    • , Richard H. Friend
    •  & Dawei Di
  • Article |

    A three-dimensionally entangled Greenberger–Horne–Zeilinger state, where all three photons reside in a qutrit space, is generated by developing a new multi-port in combination with a novel four-photon source entangled in orbital angular momentum.

    • Manuel Erhard
    • , Mehul Malik
    • , Mario Krenn
    •  & Anton Zeilinger
  • Letter |

    A direct wireless-to-optical receiver in a transparent optical link is achieved, thanks to a subwavelength two-dimensionally localized gap-plasmon mixer encoding wireless information directly onto optical signals.

    • Y. Salamin
    • , B. Baeuerle
    • , W. Heni
    • , F. C. Abrecht
    • , A. Josten
    • , Y. Fedoryshyn
    • , C. Haffner
    • , R. Bonjour
    • , T. Watanabe
    • , M. Burla
    • , D. L. Elder
    • , L. R. Dalton
    •  & J. Leuthold
  • Letter |

    A quantum walker on a hexagonal glued array of optical waveguides is made inside a glass substrate. The optimal hitting time increases linearly with the layer depth, giving a quadratic speed-up over the hitting performance by classical random walks.

    • Hao Tang
    • , Carlo Di Franco
    • , Zi-Yu Shi
    • , Tian-Shen He
    • , Zhen Feng
    • , Jun Gao
    • , Ke Sun
    • , Zhan-Ming Li
    • , Zhi-Qiang Jiao
    • , Tian-Yu Wang
    • , M. S. Kim
    •  & Xian-Min Jin
  • Letter |

    Self-organization far from thermal equilibrium in a thermo-optical feedback process occurring in a random array of Fabry–Pérot resonators is shown, adding new capability to dynamic self-assembly in creating materials with fine-tuned adaptive responses.

    • Chad Ropp
    • , Nicolas Bachelard
    • , David Barth
    • , Yuan Wang
    •  & Xiang Zhang
  • Article |

    A broadband multi-frequency Fabry–Pérot laser diode, when coupled to a high-Q microresonator, can be efficiently transformed to an ~100 mW narrow-linewidth single-frequency light source, and subsequently, to a coherent soliton Kerr comb oscillator.

    • N. G. Pavlov
    • , S. Koptyaev
    • , G. V. Lihachev
    • , A. S. Voloshin
    • , A. S. Gorodnitskiy
    • , M. V. Ryabko
    • , S. V. Polonsky
    •  & M. L. Gorodetsky
  • Review Article |

    Starting with a desired optical output it is possible to use computational algorithms to inverse design devices. The approach is reviewed here with an emphasis on nanophotonics.

    • Sean Molesky
    • , Zin Lin
    • , Alexander Y. Piggott
    • , Weiliang Jin
    • , Jelena Vucković
    •  & Alejandro W. Rodriguez
  • Letter |

    Optical non-reciprocity is experimentally realized with Rb atoms embedded in a ring cavity at room temperature. Random thermal motion of the atoms causes the probe-direction-dependent response assisted by a unidirectional control laser field.

    • Shicheng Zhang
    • , Yiqi Hu
    • , Gongwei Lin
    • , Yueping Niu
    • , Keyu Xia
    • , Jiangbin Gong
    •  & Shangqing Gong
  • Letter |

    A nonlinear coherent spectroscopy that uses three slightly different repetition-rate frequency combs is demonstrated. A 2D spectrum with comb resolution is generated using only 365 milliseconds of data, almost 600 times faster than previous approaches.

    • Bachana Lomsadze
    • , Brad C. Smith
    •  & Steven T. Cundiff
  • Article |

    Synchronization of two optical microresonator frequency combs coupled over distances larger than 20 metres is experimentally realized, opening up applications of microresonator combs and offering a chip-based photonic platform for exploring complex nonlinear systems.

    • Jae K. Jang
    • , Alexander Klenner
    • , Xingchen Ji
    • , Yoshitomo Okawachi
    • , Michal Lipson
    •  & Alexander L. Gaeta
  • Article |

    Perovskite quantum dots (QDs) are synthesized via an anion-exchange process where CsPbBr3 is used to realize a highly efficient red light-emitting diode (LED). The perovskite QD-based LED exhibits the highest external quantum efficiency of more than 20% compared with perovskite LEDs.

    • Takayuki Chiba
    • , Yukihiro Hayashi
    • , Hinako Ebe
    • , Keigo Hoshi
    • , Jun Sato
    • , Shugo Sato
    • , Yong-Jin Pu
    • , Satoru Ohisa
    •  & Junji Kido
  • Article |

    Up to three distinct frequency combs are simultaneously generated from an optical microresonator and a continuous-wave laser, enabling the deployment of dual- and triple-comb-based methods to applications unachievable by current technologies.

    • E. Lucas
    • , G. Lihachev
    • , R. Bouchand
    • , N. G. Pavlov
    • , A. S. Raja
    • , M. Karpov
    • , M. L. Gorodetsky
    •  & T. J. Kippenberg
  • Review Article |

    Over the past 10–15 years, quantitative phase imaging has moved from a research-driven to an application-focused field. This Review presents the main principles of operation and representative basic and clinical science applications.

    • YongKeun Park
    • , Christian Depeursinge
    •  & Gabriel Popescu