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High-order harmonic generation from the dressed autoionizing states

Author

Listed:
  • M. A. Fareed

    (Institut national de la recherche scientifique—Centre Energie Matériaux Telécommunications)

  • V. V. Strelkov

    (A. M. Prokhorov General Physics Institute of RAS
    Moscow Institute of Physics and Technology (State University))

  • N. Thiré

    (Institut national de la recherche scientifique—Centre Energie Matériaux Telécommunications)

  • S. Mondal

    (Institut national de la recherche scientifique—Centre Energie Matériaux Telécommunications
    ELI-ALPS, ELI-Hu Kft.)

  • B. E. Schmidt

    (Institut national de la recherche scientifique—Centre Energie Matériaux Telécommunications
    few-cycle, Inc.)

  • F. Légaré

    (Institut national de la recherche scientifique—Centre Energie Matériaux Telécommunications)

  • T. Ozaki

    (Institut national de la recherche scientifique—Centre Energie Matériaux Telécommunications)

Abstract

In high-order harmonic generation, resonant harmonics (RH) are sources of intense, coherent extreme-ultraviolet radiation. However, intensity enhancement of RH only occurs for a single harmonic order, making it challenging to generate short attosecond pulses. Moreover, the mechanism involved behind such RH was circumstantial, because of the lack of direct experimental proofs. Here, we demonstrate the exact quantum paths that electron follows for RH generation using tin, showing that it involves not only the autoionizing state, but also a harmonic generation from dressed-AIS that appears as two coherent satellite harmonics at frequencies ±2Ω from the RH (Ω represents laser frequency). Our observations of harmonic emission from dressed states open the possibilities of generating intense and broadband attosecond pulses, thus contributing to future applications in attosecond science, as well as the perspective of studying the femtosecond and attosecond dynamics of autoionizing states.

Suggested Citation

  • M. A. Fareed & V. V. Strelkov & N. Thiré & S. Mondal & B. E. Schmidt & F. Légaré & T. Ozaki, 2017. "High-order harmonic generation from the dressed autoionizing states," Nature Communications, Nature, vol. 8(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms16061
    DOI: 10.1038/ncomms16061
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