Han, YJ orcid.org/0000-0003-2141-3077, Li, LH orcid.org/0000-0003-4998-7259, Valavanis, A orcid.org/0000-0001-5565-0463 et al. (9 more authors) (2017) Development of Terahertz Frequency Quantum Cascade Lasers for the Applications as Local Oscillators. In: Pereira, MF and Shulika, O, (eds.) THz for CBRN and Explosives Detection and Diagnosis. NATO Science for Peace and Security Series B: Physics and Biophysics . Springer Netherlands , Dordrecht, Netherlands , pp. 123-134. ISBN 978-94-024-1093-8
Abstract
We report the development of terahertz frequency quantum cascade lasers for applications as local oscillators. A range of active region designs and waveguide structures have been characterised in order to develop the devices for operation at high temperatures, with high output power and low dissipated power. Quantum cascade lasers based on a LO-phonon bound-to-continuum design emitting at 3.5 THz, suitable for the detection of hydroxyl, were fabricated with a double-metal (gold-gold) waveguide structure. These devices operated in continuous-wave up to 94 K, with an output power of 0.4 mW and dissipated power of 1.7 W at 10 K. A new, mechanically robust packaging and waveguide-integration scheme is also presented for operation outside laboratory environments, which further allows integration of quantum cascade lasers with terahertz waveguides, mixers and other system components. This integration scheme yielded a better beam quality, with a divergence of <20°, compared to standard double-metal devices. Its impacts on the device performance, such as operating temperature range, spectral emission, output power and electrical properties, are presented.
Metadata
Item Type: | Book Section |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © Springer Science+Business Media B.V. 2017. This is an author produced version of a paper published in THz for CBRN and Explosives Detection and Diagnosis. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Terahertz; Quantum cascade laser; Local oscillator |
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) |
Depositing User: | Symplectic Publications |
Date Deposited: | 18 Dec 2017 10:49 |
Last Modified: | 04 Jan 2019 12:31 |
Published Version: | https://doi.org/10.1007/978-94-024-1093-8_15 |
Status: | Published |
Publisher: | Springer Netherlands |
Series Name: | NATO Science for Peace and Security Series B: Physics and Biophysics |
Identification Number: | 10.1007/978-94-024-1093-8_15 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:125244 |