Temperature dependent characteristics of λ∼3.8 μm room-temperature continuous-wave quantum-cascade lasers

J. S. Yu*, A. Evans, S. Slivken, S. R. Darvish, M. Razeghi

*Corresponding author for this work

Research output: Contribution to journalArticle

122 Scopus citations

Abstract

Temperature dependent characteristics of λ∼3.8 μm quantum-cascade lasers (QCLs) operating up to 318 K in continuous-wave (cw) mode are reported. A high-reflectivity coated 11.5-μm-wide and 4-mm-long epilayer-down bonded QCL using a diamond submount shows a considerable improved cw operation with an output power of 1.43 mW and a threshold current density of 1.51 kA/cm 2 at 298 K. The temperature dependence on optical and electrical performances of the QCLs with respect to the output power, slope efficiency, threshold current/voltage, turn-on voltage, differential series resistance, and emission wavelength are investigated systematically above liquid nitrogen temperature.

Original languageEnglish (US)
Article number251118
JournalApplied Physics Letters
Volume88
Issue number25
DOIs
StatePublished - Jun 19 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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