Towards nanowire-based terahertz quantum cascade lasers: prospects and technological challenges

Michael Krall; Martin Brandstetter; Christoph Deutsch; Hermann Detz; Tobias Zederbauer; Aaron Maxwell Andrews; Werner Schrenk; Gottfried Strasser; Karl Unterrainer

doi:10.1117/12.2004545

4 March 2013 Towards nanowire-based terahertz quantum cascade lasers: prospects and technological challenges

Michael Krall, Martin Brandstetter, Christoph Deutsch, Hermann Detz, Tobias Zederbauer, Aaron Maxwell Andrews, Werner Schrenk, Gottfried Strasser, Karl Unterrainer

Author Affiliations +

Proceedings Volume 8640, Novel In-Plane Semiconductor Lasers XII; 864018 (2013) https://doi.org/10.1117/12.2004545
Event: SPIE OPTO, 2013, San Francisco, California, United States

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.

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Michael Krall, Martin Brandstetter, Christoph Deutsch, Hermann Detz, Tobias Zederbauer, Aaron Maxwell Andrews, Werner Schrenk, Gottfried Strasser, and Karl Unterrainer "Towards nanowire-based terahertz quantum cascade lasers: prospects and technological challenges", Proc. SPIE 8640, Novel In-Plane Semiconductor Lasers XII, 864018 (4 March 2013); https://doi.org/10.1117/12.2004545

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