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Laser action by tuning the oscillator strength

Author

Listed:
  • Jrme Faist

    (Bell Laboratories, Lucent Technologies)

  • Federico Capasso

    (Bell Laboratories, Lucent Technologies)

  • Carlo Sirtori

    (Bell Laboratories, Lucent Technologies)

  • Deborah L. Sivco

    (Bell Laboratories, Lucent Technologies)

  • Albert L. Hutchinson

    (Bell Laboratories, Lucent Technologies)

  • Alfred Y. Cho

    (Bell Laboratories, Lucent Technologies)

Abstract

The threshold condition for laser action is usually achieved when the population difference between the initial and final energy levels of the laser transition reaches a critical value, determined by the equality between optical gain and losses. But the threshold condition can also be achieved by increasing the oscillator strength of the laser transition itself, while the population difference is held constant. This forms the basis of a new class of semiconductor lasers, a notable feature of which is broad wavelength tunability (on application of an electric field) in the technologically important mid-infrared region of the spectrum.

Suggested Citation

  • Jrme Faist & Federico Capasso & Carlo Sirtori & Deborah L. Sivco & Albert L. Hutchinson & Alfred Y. Cho, 1997. "Laser action by tuning the oscillator strength," Nature, Nature, vol. 387(6635), pages 777-782, June.
    • Handle: RePEc:nat:nature:v:387:y:1997:i:6635:d:10.1038_42872
    DOI: 10.1038/42872
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