High power 3-12 μm infrared lasers: Recent improvements and future trends

Manijeh Razeghi, Steven Boyd Slivken, A. Tahraoui, A. Matlis, Y. S. Park

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


In this paper, we discuss the progress of quantum cascade lasers (QCLs) grown by gas-source molecular beam epitaxy. Room temperature QCL operation has been reported for lasers emitting between 5-11 μm, with 9-11 μm lasers operating up to 425 K. Laser technology for the 3-5 μm range takes advantage of a strain-balanced active layer design. We also demonstrate record room temperature peak output powers at 9 and 11 μm (2.5 and 1 W, respectively) as well as record low 80 K threshold current densities (250 A/cm2) for some laser designs. Preliminary distributed feedback (DFB) results are also presented and exhibit single mode operation for 9 μm lasers at room temperature.

Original languageEnglish (US)
Pages (from-to)233-239
Number of pages7
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number2-3
StatePublished - Jan 1 2001


  • Gas-source molecular beam epitaxy
  • InP-based material
  • Quantum cascade laser
  • Wavefunction engineering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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