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Related Experiment Video

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Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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Perturbative High Harmonic Wave Front Control.

Zhengyan Li1,2, Graham Brown1,2, Dong Hyuk Ko1,2

  • 1Department of Physics, University of Ottawa, 25 Templeton St., Ottawa, ON, Canada K1N 6N5.

Physical Review Letters
|February 4, 2017
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Summary
This summary is machine-generated.

Researchers demonstrate wave-front control of high harmonic beams using a control pulse. This technique enhances peak intensity by orders of magnitude without physical optics, offering flexible extreme ultraviolet (XUV) beam shaping.

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Area of Science:

  • Laser Physics
  • Quantum Optics
  • Attosecond Science

Background:

  • High harmonic generation (HHG) produces extreme ultraviolet (XUV) light.
  • Controlling the wave front of XUV beams is crucial for advanced applications.
  • Existing methods for XUV beam manipulation are often limited.

Purpose of the Study:

  • To demonstrate a novel method for patterning the wave front of high harmonic beams.
  • To showcase the potential of wave-front control for focusing and defocusing XUV radiation.
  • To achieve significant peak intensity enhancement without physical optical elements.

Main Methods:

  • Intersecting the intense driving laser pulse with a weak control pulse to pattern the wave front.
  • Imprinting a Fresnel zone plate pattern on the harmonic beam.
  • Utilizing spectral wave-front optical reconstruction by diffraction (SWORD) for quality assessment.

Main Results:

  • Successful imprinting of a Fresnel zone plate pattern on the harmonic beam.
  • Demonstrated focusing and defocusing capabilities of the patterned XUV beam.
  • Achieved orders of magnitude enhancement in peak intensity.
  • Verified the quality of the focus using the SWORD technique.

Conclusions:

  • Perturbative wave-front control offers a flexible method for shaping XUV beams.
  • This technique enables the creation of XUV beams with unprecedented control.
  • The achieved flexibility approaches that of visible and infrared light technologies.