Room temperature terahertz quantum cascade laser source based on intracavity difference-frequency generation Academic Article uri icon


  • We report on our progress in the development of a terahertz quantum cascade laser source based on intracavity terahertz difference-frequency mixing in a dual-wavelength mid-infrared quantum cascade laser with the active region engineered to possess giant second-order nonlinear susceptibility. In this letter, we demonstrate devices that operate in mid-infrared at λ1 =8.9 μm and λ2 =10.5 μm and produce terahertz output at λ≈60 μm via difference-frequency generation with 7 μW output power at 80 K, 1 μW output at 250 K, and still approximately 300 nW output at 300 K. © 2008 American Institute of Physics.

author list (cited authors)

  • Belkin, M. A., Capasso, F., Xie, F., Belyanin, A., Fischer, M., Wittmann, A., & Faist, J

complete list of authors

  • Belkin, Mikhail A||Capasso, Federico||Xie, Feng||Belyanin, Alexey||Fischer, Milan||Wittmann, Andreas||Faist, Jérôme

publication date

  • January 1, 2008 11:11 AM