Surface-emitting terahertz quantum cascade laser source based on intracavity difference-frequency generation uri icon

abstract

  • We report a surface-emitting terahertz source based on intracavity difference-frequency generation in dual-wavelength midinfrared quantum cascade lasers with integrated giant second-order nonlinear susceptibility. The terahertz light is coupled out of the waveguide by a second-order grating etched into the laser ridges. In contrast to sources where the difference-frequency radiation is extracted from the facet, this approach enables extraction of the terahertz emission from the whole length of the device even when the coherence length is small. 2008 American Institute of Physics.

published proceedings

  • Applied Physics Letters

altmetric score

  • 6

author list (cited authors)

  • Pflgl, C., Belkin, M. A., Wang, Q. J., Geiser, M., Belyanin, A., Fischer, M., ... Capasso, F.

citation count

  • 25

complete list of authors

  • Pflügl, Christian||Belkin, Mikhail A||Wang, Qi Jie||Geiser, Markus||Belyanin, Alexey||Fischer, Milan||Wittmann, Andreas||Faist, Jérôme||Capasso, Federico

publication date

  • October 2008