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Proceedings Paper

Towards nanowire-based terahertz quantum cascade lasers: prospects and technological challenges
Author(s): Michael Krall; Martin Brandstetter; Christoph Deutsch; Hermann Detz; Tobias Zederbauer; Aaron Maxwell Andrews; Werner Schrenk; Gottfried Strasser; Karl Unterrainer
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Paper Abstract

We present recent work towards the realization of a nanowire-based terahertz quantum cascade laser. Nanowires offer an additional quantum mechanical confinement of electrons in the plane of a two-dimensional quantum cascade structure. The additional quantization can greatly increase the lifetimes of intersubband transitions and therefore increase the optical gain and also the maximum operating temperature of terahertz quantum cascade lasers. We outline a fabrication process that is fully scalable from nanowire to micropillar devices and present measurements of micropillar arrays in a double metal waveguide. The results are very promising and also show the main technological challenges for realizing nanowire-based devices.

Paper Details

Date Published: 4 March 2013
PDF: 7 pages
Proc. SPIE 8640, Novel In-Plane Semiconductor Lasers XII, 864018 (4 March 2013); doi: 10.1117/12.2004545
Show Author Affiliations
Michael Krall, Technische Univ. Wien (Austria)
Martin Brandstetter, Technische Univ. Wien (Austria)
Christoph Deutsch, Technische Univ. Wien (Austria)
Hermann Detz, Technische Univ. Wien (Austria)
Tobias Zederbauer, Technische Univ. Wien (Austria)
Aaron Maxwell Andrews, Technische Univ. Wien (Austria)
Werner Schrenk, Technische Univ. Wien (Austria)
Gottfried Strasser, Technische Univ. Wien (Austria)
Karl Unterrainer, Technische Univ. Wien (Austria)


Published in SPIE Proceedings Vol. 8640:
Novel In-Plane Semiconductor Lasers XII
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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