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THz quantum cascade lasers with wafer bonded active regions

Autor(en)
Martin Brandstetter, Christoph Deutsch, Alexander Benz, Garrett Cole, Hermann Detz, A. M. Andrews, Werner Schrenk, Gottfried Strasser, Karl Unterrainer
Abstrakt

We demonstrate terahertz quantum-cascade lasers with a 30 mu m thick double-metal waveguide, which are fabricated by stacking two 15 mu m thick active regions using a wafer bonding process. By increasing the active region thickness more optical power is generated inside the cavity, the waveguide losses are decreased and the far-field is improved due to a larger facet aperture. In this way the output power is increased by significantly more than a factor of 2 without reducing the maximum operating temperature and without increasing the threshold current.

Organisation(en)
Quantenoptik, Quantennanophysik und Quanteninformation
Externe Organisation(en)
Technische Universität Wien
Journal
Optics Express
Band
20
Seiten
23832-23837
Anzahl der Seiten
6
DOI
https://doi.org/10.1364/OE.20.023832
Publikationsdatum
10-2012
Peer-reviewed
Ja
ÖFOS 2012
103026 Quantenoptik, 103008 Experimentalphysik, 210006 Nanotechnologie, 103025 Quantenmechanik
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/1d671119-900f-47e0-aab5-1211c7ce2164