Biasco, S, Ciavatti, A, Li, L orcid.org/0000-0003-4998-7259 et al. (5 more authors) (2020) Highly efficient one-dimensional quasi-crystalline THz semiconductor lasers. In: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). 45th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 08-13 Nov 2020, Buffalo, NY, USA. IEEE , p. 1. ISBN 978-1-7281-6620-9
Abstract
By lithographically patterning a sequence of air slits with different widths, following the Octonacci sequence, on the top metal layer of a double-metal quantum cascade laser, we demonstrate highly efficient surface emission at THz frequencies. The proposed versatile design allows either single-frequency-mode or multimode emission over a 530 GHz bandwidth, with peak optical powers of 240 mW (190 mW) in multimode (single-frequency-mode), record slope efficiencies up to ≈ 570 mW/A at 78 K and ≈ 720 mW/A at 20 K and wall-plug efficiencies η ≈ 1%.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Keywords: | Stimulated emission; Optical design; Optical recording; Surface emitting lasers; Metals; Quantum cascade lasers; Optical surface waves |
Dates: |
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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) The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM) > Specialist Science Education Dept (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 14 May 2021 14:43 |
Last Modified: | 14 May 2021 14:43 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/irmmw-thz46771.2020.9370588 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:174000 |