Widely-tuned room-temperature terahertz quantum cascade laser sources

Quan Yong Lu*, Neelanjan Bandyopadhyay, Steven Slivken, Yanbo Bai, Manijeh Razeghi

*Corresponding author for this work

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

1 Scopus citations


Room temperature THz quantum cascade laser sources with a broad spectral coverage based on intracavity differencefrequency generation are demonstrated. Two mid-infrared active cores in the longer mid-IR wavelength range (9-11m) based on the single-phonon resonance scheme are designed with a second-order difference frequency nonlinearity specially optimized for the high operating fields that correspond to the highest mid-infrared output powers. A Čerenkov phase-matching scheme along with integrated dual-period distributed feedback gratings are used for efficient THz extraction and spectral purification. Single mode emissions from 1.0 to 4.6 THz with a side-mode suppression ratio and output power up to 40 dB and 32 μW are obtained, respectively.

Original languageEnglish (US)
Title of host publicationQuantum Sensing and Nanophotonic Devices X
StatePublished - Apr 9 2013
EventQuantum Sensing and Nanophotonic Devices X - San Francisco, CA, United States
Duration: Feb 3 2013Feb 7 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherQuantum Sensing and Nanophotonic Devices X
Country/TerritoryUnited States
CitySan Francisco, CA


  • difference frequency generation
  • 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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