Speaker
Martin Franckié
(ETH)
Description
The large ZnO LO-phonon energy reduces the thermally activated LO-phonon scattering, showing great potential for improving the temperature performance of THz quantum cascade lasers. Here, we report the observation of THz intersubband electroluminescence from ZnO/MgxZn1–xO quantum cascade structures grown on a nonpolar m-plane ZnO substrate up to room temperature. The electroluminescence spectrum shows a line width of ∼20 meV at a center frequency of ∼8.5 THz at 110 K, which is not accessible for GaAs-based quantum cascade structures because of the reststrahlen band absorption. This result demonstrates an important step toward the realization of ZnO-based THz quantum cascade lasers.
Primary authors
Bo Meng
(ETH Zurich)
Borislav Hinkov
Nolwenn Marie L. Biavan
(ETH)
Hanh T. Hoang
(TU-Wien)
Denis Lefebvre
(CNRS, CRHEA)
Maxime Hugues
(CNRS, CRHEA)
David Stark
(ETH)
Martin Franckié
(ETH)
Almudena Torres-Pardo
(Universidad Complutense de Madrid)
Julen Tamayo-Arriola
(Universidad Politécnica de Madrid)
Miguel M. Bajo
(Universidad Politécnica de Madrid)
Adrian Hierro
(Universidad Politécnica de Madrid)
Gottfried Strasser
(TU Wien)
Jérôme Faist
(ETH Zurich)
Jean M. Chauveau
(GEMAC Université Versailles Saint Quentin)
