High-power continuous-wave mid-infrared quantum cascade lasers based on strain-balanced heterostructures

M. Razeghi*, A. Evans, S. Slivken, J. S. Yu, J. G. Zheng, V. P. Dravid

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

22 Scopus citations


Limiting factors for short-wavelength QCL designs are discussed, and a model is described to predict the short-wavelength limit for strain-balanced QCL structures. High performance is predicted at wavelengths as short as 3.0μm based on a conduction band offset of 0.9 eV in the GaInAs/AlInAs materials. Recent work is presented on the growth of strained materials using gas-source molecular beam epitaxy to investigate the model predictions. Advanced material characterization, including HR-STEM, high-resolution x-ray diffraction, photoluminescence, atomic force microscopy, and wafer-scale uniformity and repeatability are demonstrated for strain-balanced QCL structures. Laser testing results are presented for QCLs operating at ∼4.8μm, and lastly, predictions for further performance improvement at short wavelengths are discussed.

Original languageEnglish (US)
Article number05
Pages (from-to)54-63
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5840 PART I
StatePublished - 2005
EventPhotonic Materials, Devices, and Applications - Seville, Spain
Duration: May 9 2005May 11 2005


  • Gas Source Molecular Beam Epitaxy
  • InP
  • Intersubband Transition
  • Mid-infrared
  • Quantum Cascade Laser
  • Strain-Balanced

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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