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