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Proceedings Paper

Silicon germanium quantum cascade heterostructures for far-infrared emission
Author(s): Robert W. Kelsall; Zoran Ikonic; Paul Harrison; Stephen A. Lynch; Robert Bates; Douglas J. Paul; David J. Norris; San Lin Liew; Anthony G. Cullis; David J. Robbins; Pavel Murzyn; Carl R. Pidgeon; Donald D. Arnone; Richard A. Soref
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Paper Abstract

Terahertz (far-infrared) intersubband electroluminescence is reported in p-type Si/SiGe quantum wells and quantum cascade structures. Surface-normal emission (without the aid of a surface grating) from light hole - heavy hole intersubband transitions has been observed for the first time in a quantum cascade device. Edge-emission measurements have also been performed, which show emission from both heavy hole - heavy hole and light hole - heavy hole transitions, and have allowed demonstration of the polarisation dependence of the emitted power, according to the selection rules for the intersubband interactions. The electroluminescence is visible up to temperatures of ~150K, in the multiple quantum well structures, and >=77K in the quantum cascade structure.

Paper Details

Date Published: 27 March 2002
PDF: 7 pages
Proc. SPIE 4654, Silicon-based and Hybrid Optoelectronics IV, (27 March 2002); doi: 10.1117/12.463846
Show Author Affiliations
Robert W. Kelsall, Univ. of Leeds (United Kingdom)
Zoran Ikonic, Univ. of Leeds (United Kingdom)
Paul Harrison, Univ. of Leeds (United Kingdom)
Stephen A. Lynch, Univ. of Cambridge (United Kingdom)
Robert Bates, Univ. of Cambridge (United Kingdom)
Douglas J. Paul, Univ. of Cambridge (United Kingdom)
David J. Norris, Univ. of Sheffield (United Kingdom)
San Lin Liew, Univ. of Sheffield (United Kingdom)
Anthony G. Cullis, Univ. of Sheffield (United Kingdom)
David J. Robbins, QinetiQ (United Kingdom)
Pavel Murzyn, Heriot-Watt Univ. (United Kingdom)
Carl R. Pidgeon, Heriot-Watt Univ. (United Kingdom)
Donald D. Arnone, TeraView Ltd. (United Kingdom)
Richard A. Soref, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 4654:
Silicon-based and Hybrid Optoelectronics IV
David J. Robbins; Ghassan E. Jabbour, Editor(s)

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