Low-threshold and high power λ∼9.0 μm quantum cascade lasers operating at room temperature

A. Matlis, S. Slivken, A. Tahraoui, K. J. Luo, J. Diaz, Z. Wu, A. Rybaltowski, C. Jelen, M. Razeghi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


We report a low threshold current density and high power for λ∼9 μmAlInAs/GaInAs quantum cascade lasers operating at room temperature. The threshold current density is 1.95 kA/cm2 at 300 K and 0.61 kA/cm2 at 80 K for 5 μs pulses at 200 Hz repetition rate. The peak output power is 700 mW at room temperature and 1.3 W at 80 K per two facets for cavity length is 3 mm with a stripe width of 20 μm. The characteristic temperature T0 is 185°C. The slope efficiency is 450 and 800 mW/A at 300 and 80 K, respectively. In continuous wave operation, the output power is more than 150 mW at 80 K and 25 mW at 140 K. This high performance was achieved by improving the material growth and processing technology.

Original languageEnglish (US)
Pages (from-to)1741-1743
Number of pages3
JournalApplied Physics Letters
Issue number12
StatePublished - Sep 18 2000

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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