RT-CW: Widely tunable semiconductor THz QCL sources

Manijeh Razeghi, Quanyong Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


Distinctive position of Terahertz (THz) frequencies (ν∼0.3-10 THz) in the electromagnetic spectrum with their lower quantum energy compared to IR and higher frequency compared to microwave range allows for many potential applications unique to them. Especially in the security side of the THz sensing applications, the distinct absorption spectra of explosives and related compounds in the range of 0.1-5 THz makes THz technology a competitive technique for detecting hidden explosives. A compact, high power, room temperature continuous wave terahertz source emitting in a wide frequency range will greatly boost the THz applications for the diagnosis and detection of explosives. Here we present a new strong-coupled strain-balanced quantum cascade laser design for efficient THz generation based intracavity DFG. Room temperature continuous wave operation with electrical frequency tuning range of 2.06-4.35 THz is demonstrated.

Original languageEnglish (US)
Title of host publicationTerahertz Emitters, Receivers, and Applications VII
EditorsManijeh Razeghi, Alexei N. Baranov, John M. Zavada, Dimitris Pavlidis
ISBN (Electronic)9781510602595
StatePublished - Jan 1 2016
EventTerahertz Emitters, Receivers, and Applications VII - San Diego, United States
Duration: Aug 28 2016Aug 31 2016


OtherTerahertz Emitters, Receivers, and Applications VII
Country/TerritoryUnited States
CitySan Diego


  • Terahertz source
  • continuous wave operation
  • difference frequency generation
  • monolithic tuning
  • quantum cascade lasers
  • terahertz

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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