[Zurück]

J. Chauveau, N. Le Biavan, M. Hugues, M. Montes Bajo, J. Tamayo-Arriola, A. Jollivet, B. Hinkov, H.T. Hoang, B. Meng, D. Lefebvre, M. Tchernycheva, F.H. Julien, G. Strasser, A. Hierro, J. Faist:
"Zinc oxide for THz quantum-cascade devices";
Vortrag: SPIE Photonics West 2020, San Francisco (eingeladen); 01.02.2020 - 06.02.2020; in: "SPIE Photonics West Conference 11281", (2020), Paper-Nr. 11281-47, 1 S.

Quantum Cascade Lasers are very efficient and already commercialized. Now lots of effort are made to shift from IR to THz due to the numerous potential applications linked to this wavelength domain. But the operation temperature is still limited to ~200 K in the THz range due to an intrinsic limitation of the material systems used (related to the low LO-phonon energy of III-V compounds). In this presentation we will show that Zinc Oxide could be a good candidate for this application thanks to its large LO-phonon energy (72 meV). Nevertheless, the quantum cascade devices represent a tremendous challenge in terms of design, growth and processing. Establishing a new state-of-the-art for the design, growth and processing of ZnO/ZnMgO heterostructures is the main aim of our project funded by the European Commission's HORIZON 2020 ("ZOTERAC" FET-OPEN 6655107). In this presentation we will review our strategies to tackle all these issues to achieve THz emitters.

https://publik.tuwien.ac.at/files/publik_288467.pdf