Xu, G, Halioua, Y, Colombelli, R et al. (6 more authors) (2013) Phase-locked arrays of surface-emitting terahertz distributed feedback quantum cascade lasers. In: Lasers and Electro-Optics Europe (CLEO EUROPE/IQEC), 2013 Conference on and International Quantum Electronics Conference. 2013 Conference on Lasers and Electro-Optics Europe and International Quantum Electronics Conference, CLEO/Europe-IQEC 2013, 12-16 May 2013, Munich. IEEE ISBN 978-1-4799-0593-5
Abstract
We first describe a novel concept to excite the fundamental radiative mode in second-order distributed-feedback (DFB) surface-emitting THz quantum cascade (QC) lasers, which leads to high wall-plug power efficiencies. A graded photonic heterostructure (GPH) is implemented to spatially separate the field distributions of radiative and non-radiative modes [1], hence favoring the former one. The GPH lasers then realize single-mode emissions in a wide spectral range with very high power efficiencies, as well as low-divergence single-lobed emission patterns. The use of a low-threshold bound-to-continuum active region permits continuous-wave (CW) operation with output power of the order of ∼ 4 mW (unpurged) at 12K (Fig. 1a).
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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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: | 23 Jul 2014 09:48 |
Last Modified: | 19 Dec 2022 13:27 |
Published Version: | http://dx.doi.org/10.1109/CLEOE-IQEC.2013.6800777 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/CLEOE-IQEC.2013.6800777 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:79601 |