3.5 THz dual feedhorn quantum cascade laser a step towards achieving a frequency stable supra-THz heterodyne local oscillator

Ellison, BN, Rawlings, T, Brewster, N et al. (6 more authors) (2017) 3.5 THz dual feedhorn quantum cascade laser a step towards achieving a frequency stable supra-THz heterodyne local oscillator. In: 2017 International Symposium on Antennas and Propagation (ISAP). 2017 International Symposium on Antennas and Propagation (ISAP), 30 Oct - 02 Nov 2017, Phuket, Thailand. IEEE ISBN 978-1-5386-0465-6

Abstract

We present the first antenna power measurements from a double metal terahertz-frequency quantum cascade laser (THz QCL) mounted within a waveguide cavity and incorporating dual diagonal feedhorns that enable directional output coupling of THz radiation from both laser facets. The feedhorn antenna patterns have been measured simultaneously at a frequency of 3.5 THz and with the QCL operating at an ambient temperature of 60 K in continuous wave mode. Comparison with a feedhorn theoretical model shows good pattern correlation and implies that the QCL signal is likely propagating within the waveguide in a fundamental mode.

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Item Type:	Proceedings Paper
Authors/Creators:	Ellison, BN Rawlings, T Brewster, N Oldfield, ML Valavanis, A https://orcid.org/0000-0001-5565-0463 Han, Y Linfield, EH Davies, AG https://orcid.org/0000-0002-1987-4846 Saenz, E
Copyright, Publisher and Additional Information:	© 2017, IEEE. This is an author produced version of a paper published in 2017 International Symposium on Antennas and Propagation (ISAP). Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Uploaded in accordance with the publisher’s self-archiving policy.
Keywords:	QCL; terahertz; heterodyne; local oscillator; waveguide; feedhorn
Dates:	Published: 21 December 2017 Published (online): 21 December 2017 Accepted: 31 August 2017
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds)
Funding Information:	Funder Grant number European Space Agency 4179A
Depositing User:	Symplectic Publications
Date Deposited:	12 Jan 2018 10:53
Last Modified:	29 Mar 2018 15:03
Published Version:	http://ieeexplore.ieee.org/document/8229016/
Status:	Published
Publisher:	IEEE
Identification Number:	10.1109/ISANP.2017.8229016
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:126173

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3.5 THz dual feedhorn quantum cascade laser a step towards achieving a frequency stable supra-THz heterodyne local oscillator

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