High power, room temperature, continuous-wave operation of quantum cascade lasers grown by GasMBE

A. Evans*, J. David, L. Doris, J. S. Yu, S. Slivken, M. Razeghi

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


Very high power continuous-wave quantum cascade lasers are demonstrated in the mid-infrared (3-6μm) wavelength range. λ̃6 μm high-reflectivity coated QCLs are demonstrated producing over 370 mW continuous-wave power at room temperature with continuous-wave operation up to 333 K. Advanced heterostructure geometries, including the use of a thick electroplated gold, epilayer-side heat sink and a buhed-ridge heterostructure are demonstrated to improve laser performance significantly when combined with narrow laser ridges. Recent significant improvements in CW operation are presented and include the development if narrow (9 μm-wide) ridges for high temperature CW operation. GasMBE growth of the strain-balanced λ∼6 μm QCL heterostructure is discussed. X-ray diffraction measurements are presented and compared to computer simulations that indicate excellent layer and compositional uniformity of the structure.

Original languageEnglish (US)
Pages (from-to)188-195
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2004
EventQuantum Sensing and Nanophotonic Devices - San Jose, CA, United States
Duration: Jan 25 2004Jan 29 2004


  • Continuous-wave
  • Gas-source molecular beam epitaxy
  • High-power semiconductor laser
  • Intersubband transition
  • Mid-infrared
  • Quantum cascade laser
  • Wavefunction engineering

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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