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Standing Waves in a Cavity01:28

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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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Periodic index-modulated plasma waveguide.

B D Layer1, A G York, S Varma

  • 1Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD 20742, USA. layerbd@gmail.com

Optics Express
|March 19, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed a wire-obstructed cluster flow technique to create stable plasma waveguides with periodic voids. This method enables guided propagation for advanced applications like quasi-phase matching.

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Area of Science:

  • Plasma Physics
  • Laser-Plasma Interactions
  • Waveguide Fabrication

Background:

  • Plasma waveguides are crucial for high-intensity laser propagation.
  • Existing methods for creating modulated plasma waveguides have limitations.
  • Controlling plasma waveguide structure is key for applications like quasi-phase matching.

Purpose of the Study:

  • To demonstrate a novel wire-obstructed cluster flow technique for fabricating periodically modulated plasma waveguides.
  • To characterize the stability and dimensions of voids within these waveguides.
  • To assess the performance of these waveguides for high-intensity laser propagation.

Main Methods:

  • Utilizing a wire-obstructed cluster flow in hydrogen, nitrogen, and argon.
  • Creating plasma waveguides with sharp, stable voids.
  • Investigating void dimensions (down to 50 microm) and periodicity (down to 200 microm).
  • Testing guided laser propagation at intensities up to 2 x 10^17 W/cm^2.

Main Results:

  • Successfully fabricated periodically modulated plasma waveguides with stable voids.
  • Achieved void sizes as small as 50 microm and periods as small as 200 microm.
  • Voids persisted throughout the plasma waveguide's lifetime.
  • Demonstrated guided propagation at high laser intensities.

Conclusions:

  • The wire-obstructed cluster flow technique offers precise control over plasma waveguide structure.
  • This method produces stable, periodically modulated waveguides suitable for advanced laser applications.
  • Index-modulated guides created via this technique are advantageous over diameter-modulated guides for quasi-phase matching.