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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Copropagating superluminal and slow light manifested by electromagnetically assisted nonlinear optical processes.

Jiepeng Zhang1, Gessler Hernandez, Yifu Zhu

  • 1Department of Physics, Florida International University, Miami, Florida 33199, USA.

Optics Letters
|August 12, 2006
PubMed
Summary

Electromagnetically induced transparency (EIT) enables simultaneous superluminal and subluminal light propagation. This study experimentally observed nonlinear optical gain and loss, with one light component amplified and the other attenuated.

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Area of Science:

  • Quantum optics
  • Nonlinear optics
  • Atomic physics

Background:

  • Electromagnetically induced transparency (EIT) is a quantum interference effect.
  • EIT enables manipulation of light propagation properties, including group velocity.
  • Nonlinear optical processes are crucial for light-matter interactions.

Purpose of the Study:

  • To experimentally observe nonlinear optical gain and loss.
  • To investigate simultaneous superluminal and subluminal light propagation.
  • To explore the role of EIT in controlling light-matter interactions.

Main Methods:

  • Utilizing a three-level EIT system.
  • Employing two circular components of linearly polarized light.
  • Investigating third-order nonlinear optical processes.

Main Results:

  • Observed nonlinear optical gain and loss.
  • Demonstrated simultaneous superluminal and subluminal light propagation.
  • Attenuated light component experienced normal dispersion and subluminal propagation.
  • Amplified light component experienced anomalous dispersion and superluminal propagation.

Conclusions:

  • EIT can simultaneously induce optical gain and loss.
  • Control over light group velocity (both superluminal and subluminal) is achievable.
  • These findings have implications for optical switching and quantum information processing.