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Related Experiment Videos

Lasing modes in a spiral-shaped dielectric microcavity.

Tea-Yoon Kwon1, Soo-Young Lee, Michael S Kurdoglyan

  • 1National Creative Research Intiative Center for Controlling Optical Chaos, Pai-Chai University, Daejeon, Korea.

Optics Letters
|April 28, 2006
PubMed
Summary

High-Q whispering-gallery modes in spiral microcavities can act as lasing modes. Selective pumping excites quasi-scarred modes with directional emission, leading to mode competition.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Quantum Electronics

Background:

  • Dielectric microcavities support unique optical resonance modes.
  • Spiral shapes offer novel cavity designs for light manipulation.
  • Understanding lasing modes is crucial for laser development.

Purpose of the Study:

  • Investigate resonance patterns and lasing modes in spiral dielectric microcavities.
  • Explore the excitation of whispering-gallery and quasi-scarred modes.
  • Analyze mode competition in active microcavity systems.

Main Methods:

  • Passive and active medium calculations for resonance and lasing modes.
  • Spectral analysis of time-evolving light fields.
  • Selective external pumping for mode excitation.

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Main Results:

  • High-Q resonance modes identified as whispering-gallery-like modes.
  • Whispering-gallery modes readily excited as lasing modes.
  • Quasi-scarred resonance modes exhibit strong directional emission upon selective pumping.

Conclusions:

  • Spiral microcavities support tunable lasing modes.
  • Selective pumping enables control over directional emission.
  • Mode competition dynamics are observable in these systems.