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Spatial-spectral distribution of Rabi radiation generated in plasma.

G Heck1, R Compton, A Filin

  • 1Center for Advanced Photonics Research, College of Science and Technology, Temple University, Philadelphia, Pennsylvania 19122, USA.

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|August 18, 2011
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Summary
This summary is machine-generated.

Researchers observed and controlled Rabi sideband radiation using shaped picosecond laser pulses interacting with excited atomic oxygen. This study demonstrates precise control over light-matter interactions in laser-induced microplasmas.

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Area of Science:

  • Atomic physics
  • Laser-induced plasmas
  • Nonlinear optics

Background:

  • Coherent Rabi sideband radiation arises from strong laser-atom interactions.
  • Understanding spatial-spectral distributions is crucial for controlling light propagation and energy deposition.
  • Laser-induced microplasmas provide a dense, excited medium for studying fundamental light-matter interactions.

Purpose of the Study:

  • To observe and control the spatial-spectral distributions of coherent, dynamic Rabi sideband radiation.
  • To investigate the influence of laser pulse temporal shape on Rabi sideband characteristics.
  • To compare experimental observations with theoretical predictions.

Main Methods:

  • Generating neutral excited atomic oxygen in a laser-induced microplasma.
  • Interacting the excited atomic oxygen with shaped picosecond probe laser pulses (10^10 W cm^-2).
  • Measuring and comparing spatial-spectral distributions for asymmetric and Gaussian temporal pulse shapes.

Main Results:

  • Successfully observed and controlled spatial-spectral distributions of Rabi sideband radiation.
  • Demonstrated distinct spatial-spectral distributions for asymmetric versus Gaussian picosecond laser pulses.
  • Achieved quantitative agreement between experimental results and theoretical predictions.

Conclusions:

  • The temporal shape of picosecond laser pulses significantly influences Rabi sideband radiation characteristics.
  • Theoretical models incorporating radial intensity distribution accurately predict observed spatial-spectral distributions.
  • This work offers insights into controlling coherent light-matter interactions in laser-produced plasmas.