Quantum cascade microdisk lasers

Claire F. Gmachl, Jerome Faist, Federico Capasso, Carlo Sirtori, Deborah L. Sivco, Alfred Y. Cho

Research output: Contribution to journalArticlepeer-review


The first long wavelength infrared quantum cascade (QC) disk laser operating up to a wavelength as long as 11.6 μm is reported. In the present structure, based `two-well vertical transition', the microcavity regime of the QC disk laser with both an increase in the emission wavelength and a decrease of the disk size is described. The most important feature accompanying the size-reduction of the laser cavity is the reduction of the mode density, which is described by the so called beta factor. Finally, based on a two-level rate equation model and on precise measurements of light output to current characteristics, the threshold characteristics and the direct measurement of β in a true microcavity QC laser is discussed.

Original languageEnglish (US)
Pages (from-to)427-428
Number of pages2
JournalConference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
StatePublished - Jan 1 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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