Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

Efficient high-order harmonic generation boosted by below-threshold harmonics.

Author

  • Fernando Brizuela
  • Christoph Heyl
  • Piotr Rudawski
  • David Kroon
  • Linnea Rading
  • J M Dahlström
  • Johan Mauritsson
  • Per Johnsson
  • Cord Arnold
  • Anne L'Huillier

Summary, in English

High-order harmonic generation (HHG) in gases has been established as an important technique for the generation of coherent extreme ultraviolet (XUV) pulses at ultrashort time scales. Its main drawback, however, is the low conversion efficiency, setting limits for many applications, such as ultrafast coherent imaging, nonlinear processes in the XUV range, or seeded free electron lasers. Here we introduce a novel scheme based on using below-threshold harmonics, generated in a "seeding cell", to boost the HHG process in a "generation cell", placed further downstream in the focused laser beam. By modifying the fundamental driving field, these low-order harmonics alter the ionization step of the nonlinear HHG process. Our dual-cell scheme enhances the conversion efficiency of HHG, opening the path for the realization of robust intense attosecond XUV sources.

Department/s

  • Atomic Physics
  • NanoLund

Publishing year

2013

Language

English

Publication/Series

Scientific Reports

Volume

3

Document type

Journal article

Publisher

Nature Publishing Group

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 2045-2322