High-harmonic generation articles within Nature Physics

Featured

  • News & Views |

    Generating high harmonics or attosecond pulses of light is normally thought of as a classical process, but a theoretical study has now shown how the process could be driven by quantum light.

    • Dong Hyuk Ko
    •  & P. B. Corkum

  • Article |

    High-harmonic generation is a source of high-frequency radiation and is typically driven by strong, but classical, laser fields. A theoretical study now shows that using quantum light states as the driver extends the spectrum of outgoing radiation in a controllable manner.

    • Alexey Gorlach
    • , Matan Even Tzur
    •  & Ido Kaminer

  • News & Views |

    Strongly laser-driven quantum correlated many-body systems lead to the generation of light with exotic quantum features — the quantumness of a many-body system is imprinted on the state of the emitted light.

    • Paraskevas Tzallas

  • Article |

    Strongly driven light sources have become useful in many ways but are limited to classical emission. A quantum-optical theory now shows how non-classical states of light can be achieved from strongly-driven many-body systems, for example, non-coherent and correlated high-harmonic generation.

    • Andrea Pizzi
    • , Alexey Gorlach
    •  & Ido Kaminer

  • Article |

    Attosecond circular-dichroism chronoscopy—a spectroscopy technique that employs two circularly polarized pulses in co-rotating and counter-rotating geometries—can measure the amplitudes and phases of continuum–continuum transitions in electron vortices.

    • Meng Han
    • , Jia-Bao Ji
    •  & Hans Jakob Wörner

  • News & Views |

    Quantum confinement effects offer a more comprehensive understanding of the fundamental processes that drive extreme optical nonlinearities in nano-engineered solids, opening a route to unlocking the potential of high-order harmonic generation.

    • Julien Madéo
    •  & Keshav M. Dani

  • News & Views |

    In a study on high-harmonic generation from a dense atomic xenon gas, the strong-field light–matter interaction is shown to leave a quantum mechanical imprint on the incident light that escapes the semiclassical picture of strong-field physics.

    • Thomas Fennel

  • News & Views |

    High-order harmonics of laser pulses yield spectral components with shorter wavelength and duration and tighter focus than the original pulse. Precise spatiotemporal characterization of this radiation from a relativistic plasma mirror is relevant for ultrafast science.

    • Laszlo Veisz

  • Article |

    Relativistic mirrors are a promising tool to reach laser intensities up to the Schwinger limit. Such a mirror is created in ultra-intense laser–solid interactions, and its temporal and spatial effects on the reflected laser beam are characterized.

    • Ludovic Chopineau
    • , Adrien Denoeud
    •  & Fabien Quéré

  • Letter |

    High-harmonic generation up to the seventh harmonic is observed from the intrinsic three-dimensional topological insulator BiSbTeSe2. The parallel components of the even-order harmonics arise directly from the topological surface states.

    • Ya Bai
    • , Fucong Fei
    •  & Peng Liu

  • Letter |

    High harmonics are generated from a thin film by leveraging the epsilon-near-zero effect. These kinds of harmonic are found to exhibit a pronounced spectral redshift as well as linewidth broadening caused by the time-dependency of this effect.

    • Yuanmu Yang
    • , Jian Lu
    •  & Igal Brener

  • Review Article |

    This Review surveys recent efforts at understanding and characterizing generation of high harmonics from solid-state materials.

    • Shambhu Ghimire
    •  & David A. Reis

  • Letter |

    The demonstration of substantially enhanced high-harmonic emission from a silicon metasurface suggests a route towards novel photonic devices based on a combination of ultrafast strong-field physics and nanofabrication technology.

    • Hanzhe Liu
    • , Cheng Guo
    •  & David A. Reis

  • Letter |

    Attosecond light pulses are used to probe ultrafast processes. The experimental observation of attosecond electron pulses now promises the marriage of these techniques with electron microscopy and diffraction.

    • Yuya Morimoto
    •  & Peter Baum

  • Letter |

    In different applications the Gouy phase is used to describe broadband lasers, but new 3D measurements of the spatial dependence of a focused laser pulse show serious deviations from the Gouy phase.

    • Dominik Hoff
    • , Michael Krüger
    •  & Peter Hommelhoff

  • News & Views |

    Light beams with controllable orbital angular momentum can be generated in the extreme-ultraviolet or soft-X-ray regime, pushing the application of twisted light to the nanoscale.

    • Carlos Hernández-García

  • Letter |

    High-harmonic generation in a solid turns out to be sensitive to the interatomic bonding — a very useful feature that could enable the all-optical imaging of the interatomic potential.

    • Yong Sing You
    • , David A. Reis
    •  & Shambhu Ghimire

  • Letter |

    Observations of high-harmonic generation from a single layer of a transition metal dichalcogenide opens the door to studying strong-field and attosecond phenomena in two-dimensional materials.

    • Hanzhe Liu
    • , Yilei Li
    •  & David A. Reis

  • Letter |

    The change in pitch of a passing car engine is a classic example of the translational Doppler effect, but rotational Doppler shifts can also arise, as shown for circularly polarized light passing through a spinning nonlinear optical crystal.

    • Guixin Li
    • , Thomas Zentgraf
    •  & Shuang Zhang

  • Letter |

    Experimentally probing the dynamics of laser–plasma interactions is hard, owing to the nature of the relevant temporal and spatial scales at play. Ptychography, a phase-problem solving technique, can help the analysis of such interaction measurements.

    • A. Leblanc
    • , S. Monchocé
    •  & F. Quéré

  • Letter |

    An interferometric measurement based on high-harmonic generation now provides direct access to the electron wavefunction during field-induced tunnelling.

    • O. Pedatzur
    • , G. Orenstein
    •  & N. Dudovich

  • News & Views |

    Light has long been used to detect the chirality of molecules but high-order harmonic generation now provides access to these chiral interactions on ultrafast timescales.

    • Minhaeng Cho

  • Letter |

    Molecules that are mirror images of each other usually behave identically, unless they are interacting with other chiral objects. High-harmonic generation can provide access to the dynamics of chiral interactions on ultrafast timescales.

    • R. Cireasa
    • , A. E. Boguslavskiy
    •  & V. R. Bhardwaj

  • News & Views |

    High-harmonic spectroscopy is a powerful tool for probing the electronic structure of atoms and molecules in gases. Experiments now show that similar emission from solids has a different origin.

    • Giulio Vampa
    •  & David M. Villeneuve

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