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Related Experiment Videos

Single attosecond pulse generation in the multicycle-driver regime by adding a weak second-harmonic field.

Thomas Pfeifer1, Lukas Gallmann, Mark J Abel

  • 1Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, USA. tpfeifer@lbl.gov

Optics Letters
|April 8, 2006
PubMed
Summary

Researchers developed a method to generate single attosecond pulses using tailored laser fields. This technique controls high-harmonic generation, producing pulses every full cycle for enhanced precision in attosecond science.

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Area of Science:

  • Attosecond science
  • Nonlinear optics
  • Quantum dynamics

Background:

  • High-harmonic generation (HHG) typically produces attosecond pulses every half-cycle of the driving laser field.
  • Controlling the emission of attosecond pulses is crucial for precise measurements and applications.
  • Existing methods often lack the precision to isolate single attosecond pulses reliably.

Purpose of the Study:

  • To present a novel method for producing single attosecond pulses.
  • To demonstrate control over high-harmonic generation using tailored multicycle laser pulses.
  • To investigate the influence of driving pulse characteristics on attosecond pulse emission.

Main Methods:

  • Utilizing multicycle driver laser pulses with tailored properties for high-harmonic generation.

Related Experiment Videos

  • Modifying the driving pulse to favor attosecond pulse production every full laser cycle.
  • Employing classical and quantum-mechanical model calculations to analyze electron dynamics.

    • Main Results:

    • A method for generating single attosecond pulses by controlling HHG was successfully demonstrated.
    • Tailoring the driving pulse ensures attosecond pulse emission occurs only every full cycle.
    • A minor addition (1%) of phase-locked second-harmonic light to the fundamental driver pulse caused a significant (15%) difference in electron kinetic energies.

    Conclusions:

    • The presented method offers precise control over attosecond pulse generation.
    • Tailoring laser pulse parameters is effective in isolating single attosecond pulses.
    • This technique has potential for advancing attosecond spectroscopy and exploring fundamental quantum phenomena.