Electromagnetic-field analysis of diagonal-feedhorn antennas for terahertz-frequency quantum-cascade laser integration

Zafar, E, Auriacombe, O, Rawlings, T et al. (9 more authors) (2019) Electromagnetic-field analysis of diagonal-feedhorn antennas for terahertz-frequency quantum-cascade laser integration. In: Proceedings of the 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2019). 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2019), 01-06 Sep 2019, Paris, France. IEEE ISBN 978-1-5386-8285-2

Abstract

We present an electromagnetic-field analysis of a terahertz-frequency quantum-cascade laser (THz QCL) integrated with a mechanically micro-machined waveguide cavity and diagonal feedhorn. A hybrid finite-element/Fourier transform approach enables analysis of both the near-field and far-field regions and is shown to agree well with experimental observations. The far-field antenna patterns show enhancement of the beam profile when compared with an unmounted QCL, in terms of beam divergence and side-lobe suppression ratio. Furthermore, we demonstrate integration of the QCL with dual diagonal feedhorns, enabling simultaneous access to both facets of the QCL, underpinning future integration with a satellite-based receiver and frequency-stabilization subsystem.

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Item Type:	Proceedings Paper
Authors/Creators:	Zafar, E Auriacombe, O Rawlings, T Brewster, N Oldfield, ML Han, Y Li, LH https://orcid.org/0000-0003-4998-7259 Linfield, EH Davies, AG https://orcid.org/0000-0002-1987-4846 Dean, P https://orcid.org/0000-0002-3950-4359 Ellison, BN Valavanis, A https://orcid.org/0000-0001-5565-0463
Copyright, Publisher and Additional Information:	© 2019, IEEE. This is an author produced version of a paper published in Proceedings of the 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2019). Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works. Uploaded in accordance with the publisher's self-archiving policy.
Keywords:	Quantum cascade lasers; Optical waveguides; Apertures; Rectangular waveguides; Laser beams; Waveguide lasers
Dates:	Published: 21 October 2019 Published (online): 21 October 2019 Accepted: 29 June 2019
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds)
Funding Information:	Funder Grant number Centre for Earth Observation Instrumentation Not Known UK Space Agency Not Known
Depositing User:	Symplectic Publications
Date Deposited:	19 Jul 2019 12:03
Last Modified:	21 Dec 2019 01:48
Status:	Published
Publisher:	IEEE
Identification Number:	10.1109/IRMMW-THz.2019.8873995
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:148757

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Electromagnetic-field analysis of diagonal-feedhorn antennas for terahertz-frequency quantum-cascade laser integration

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