Quantum-cascade lasers with heterogeneous cascades: Multiple-wavelength operation

Claire Gmachl, Deborah L. Sivco, Raffaele Colombelli, Federico Capasso, Trinesha S. Mosely, Axel Straub, James N. Baillargeon, Alfred Y. Cho

Research output: Contribution to specialist publicationArticle

1 Scopus citations


The quantum-cascade (QC) laser with heterogeneous cascades were discussed. It was found that in this type of heterogeneous cascade, it was not necessary to adjust the design electric field of the two stacks to match each other and each substack was apportioned the appropriate fraction of the total applied bias. The analysis showed that the low-temperature threshold current densities were 2.67 and 2.70 kA cm2.

Original languageEnglish (US)
Number of pages1
Specialist publicationOptics and Photonics News
StatePublished - Dec 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Quantum-cascade lasers with heterogeneous cascades: Multiple-wavelength operation'. Together they form a unique fingerprint.

Cite this