Multi-Watt high-power THz frequency quantum cascade lasers

Abstract

Multi-Watt high power terahertz (THz) frequency quantum cascade lasers are demonstrated, based on a single, epitaxially-grown, 24-μm-thick active region embedded into a surface-plasmon waveguide. The devices emit in pulsed mode at a frequency of ~4.4 THz, and have a maximum operating temperature of 132 K. The maximum measurable emitted powers from a single facet are ∼2.4 W at 10 K and ∼1.8 W at 77 K, with no correction being made for the optical collection efficiency of the apparatus, or absorption by the cryostat polyethylene window.

Metadata

Item Type:	Article
Authors/Creators:	Li, LH https://orcid.org/0000-0003-4998-7259 Chen, L Freeman, J https://orcid.org/0000-0002-5493-6352 Salih, M Dean, P Davies, AG https://orcid.org/0000-0002-1987-4846 Linfield, EH
Copyright, Publisher and Additional Information:	(c) 2017, Author(s). This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0/)
Keywords:	quantum cascade lasers; terahertz; high power; semiconductor lasers
Dates:	Accepted: 13 April 2017 Published (online): 24 April 2017 Published: 8 June 2017
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 EPSRC EP/J017671/1 EU - European Union GA 665158 Royal Society WM150029
Depositing User:	Symplectic Publications
Date Deposited:	20 Apr 2017 11:06
Last Modified:	18 Jan 2018 03:34
Status:	Published
Publisher:	Institution of Engineering and Technology (IET)
Identification Number:	10.1049/el.2017.0662
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:115190

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Multi-Watt high-power THz frequency quantum cascade lasers

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