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Related Experiment Videos

High-power directional emission from microlasers with chaotic resonators

Gmachl1, Capasso, Narimanov

  • 1C. Gmachl, F. Capasso, J. Faist, D. L. Sivco, and A. Y. Cho are at Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974, USA. E. E. Narimanov and A. D. Stone are in the Department of Applied Physics, Yale University.

Science (New York, N.Y.)
|June 11, 1998
PubMed
Summary

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Semiconductor microcylinder lasers with deformed optical resonators achieve significantly higher power and directionality. This novel design utilizes a "bow-tie" resonance for enhanced performance in mid-infrared quantum-cascade lasers.

Area of Science:

  • Optics and Photonics
  • Semiconductor Device Physics

Background:

  • Conventional semiconductor lasers often exhibit limited directionality and power output.
  • Whispering-gallery modes in circular resonators restrict beam characteristics.

Purpose of the Study:

  • To develop high-power and highly directional semiconductor lasers.
  • To investigate the effect of deformed optical resonators on laser performance.

Main Methods:

  • Fabrication of semiconductor microcylinder lasers with deformed cross-sections.
  • Analysis of optical resonance modes, specifically comparing "bow-tie" to "whispering-gallery" modes.
  • Measurement of far-field power output at favorable directions.

Main Results:

  • Achieved power increases of up to three orders of magnitude in favorable far-field directions.

Related Experiment Videos

  • Demonstrated superior performance with "bow-tie" resonance in highly deformed resonators.
  • Observed a transition from "whispering-gallery" to "bow-tie" modes with increasing deformation.

    • Conclusions:

    • Deformed cross-section optical resonators enable significant improvements in laser power and directionality.
    • The "bow-tie" resonance is key to enhanced performance in these novel laser designs.
    • This resonator concept is broadly applicable to various semiconductor and high-refractive index material lasers.