Work

High-order harmonic generation in an active grating

Year: 2019

Type: article

Abstract: We study theoretically and experimentally high-order harmonic generation (HHG) using two noncollinear driving fields focused in gases. We show that these two fields form a nonstationary blazed active grating in the generation medium. The intensity and phase structure of this grating rule the far-field properties of the emission, such as the relative amplitude of the diffraction orders. Full macroscopic calculations and experiments support this wave-based picture of the process, complementing and extending its standard ``photon'' picture. This insight into the HHG process allows us to envision structuration schemes to convert femtosecond lasers to attosecond pulses with increased efficiency.

Source: Physical Review A

DOI: 10.1103/physreva.99.033806

Authors: C. Chappuis, D. Bresteau, T. Auguste, O. Gobert, T. Ruchon

Institutions: Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, CEA Paris-Saclay - Etablissement de Saclay, Laboratoire Interactions, Dynamiques et Lasers

Language: English

Topic: Laser-Matter Interactions and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Agence Nationale de la Recherche

Awards: XUV STudies of light beams carrying Angular momenta: Synthesis and Exchanges, G1893869435, Physics: Atoms, Light, Matter, Plateforme pour la dynamique attoseconde, G7917003928