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Solid-State Source of Subcycle Pulses in the Midinfrared.

E A Stepanov1,2, A A Lanin1,2, A A Voronin1,2

  • 1Physics Department, International Laser Center, M. V. Lomonosov Moscow State University, Moscow 119992, Russia.

Physical Review Letters
|August 6, 2016
PubMed
Summary
This summary is machine-generated.

We developed a robust, all-solid-state method to generate microjoule subcycle pulses in the mid-infrared. This technique utilizes ionization-assisted pulse self-compression for efficient spectral broadening and waveform generation.

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Area of Science:

  • * Physics, Optics, and Photonics
  • * Ultrafast Laser Science and Technology

Background:

  • * Generating ultrashort (subcycle) laser pulses is crucial for probing and controlling ultrafast phenomena.
  • * Existing methods often rely on complex or gas-based systems, limiting accessibility and robustness.

Purpose of the Study:

  • * To demonstrate a novel, all-solid-state approach for generating high-energy subcycle pulses in the mid-infrared.
  • * To leverage unique solid-state nonlinear optical dynamics for efficient pulse generation.

Main Methods:

  • * A cascade of optimized parametric amplification, difference-frequency generation, spectral broadening, and chirp compensation stages.
  • * Utilizing ionization-assisted pulse self-compression dynamics in a solid-state material.
  • * Employing ultrabroadband four-wave parametric amplification phase-matched near the zero-group-velocity wavelength.

Main Results:

  • * Successful generation of microjoule subcycle pulses in the mid-infrared spectral region.
  • * Demonstration of highly efficient spectral broadening enabled by the ionization-assisted dynamics.
  • * Achieved robust and stable pulse generation through an all-solid-state system.

Conclusions:

  • * The presented all-solid-state approach offers a practical and robust method for generating high-energy subcycle mid-infrared pulses.
  • * The discovered ionization-assisted self-compression dynamics are key to enabling efficient spectral broadening in solid-state media.
  • * This work paves the way for new applications in ultrafast spectroscopy and nonlinear optics.