Quantum cascade semiconductor infrared and far-infrared lasers: from trace gas sensing to non-linear optics

G Duxbury, N Langford, M T McCulloch, S Wright

Research output: Contribution to journalLiterature review

83 Citations (Scopus)


The Quantum cascade (QC) laser is an entirely new type of semiconductor device in which the laser wavelength depends on the band-gap engineering. It can be made to operate over a much larger range than lead salt lasers, covering significant parts of both the infrared and submillimetre regions, and with higher output power.
In this tutorial review we survey some of the applications of these new lasers, which range from trace gas detection for atmospheric or medical purposes to sub-Doppler and time dependent non-linear spectroscopy.

Original languageEnglish
Pages (from-to)921-934
Number of pages14
JournalChemical Society Reviews
Issue number11
Publication statusPublished - Nov 2005



  • distributed feedback laser
  • continuous-wave operation
  • sensitivity analysis
  • room temperature
  • nitrous-oxide
  • mu-m
  • spectroscopy
  • doppler
  • spectrometer
  • passage

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