Very high wall plug efficiency of quantum cascade lasers

Y. Bai*, S. Slivken, S. R. Darvish, M. Razeghi

*Corresponding author for this work

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

9 Scopus citations


We demonstrate very high wall plug efficiency (WPE) of mid-infrared quantum cascade lasers (QCLs) in low temperature pulsed mode operation (53%), room temperature pulsed mode operation (23%), and room temperature continuous wave operation (18%). All of these values are the highest to date for any QCLs. The optimization of WPE takes the route of understanding the limiting factors of each sub-efficiency, exploring new designs to overcome the limiting factor, and constantly improving the material quality.

Original languageEnglish (US)
Title of host publicationQuantum Sensing and Nanophotonic Devices VII
StatePublished - 2010
EventQuantum Sensing and Nanophotonic Devices VII - San Francisco, CA, United States
Duration: Jan 24 2010Jan 28 2010

Publication series

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


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


  • Mid infrared
  • Quantum cascade lasers
  • Wall plug efficiency

ASJC Scopus subject areas

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


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