Qi, X, Kundu, I orcid.org/0000-0002-3564-1903, Dean, P et al. (8 more authors) (2017) Mode selection and tuning mechanisms in coupled-cavity terahertz quantum cascade lasers. IEEE Journal of Selected Topics in Quantum Electronics, 23 (4). ISSN 1077-260X
Abstract
We present a model for longitudinal mode competition in coupled-cavity (CC) terahertz (THz) quantum cascade lasers (QCLs) by using a scattering matrix method and multi-mode reduced rate equations (RREs). The dependence of the mode selection and tuning characteristics on various device parameters are systematically investigated, including the net waveguide loss, the optical length of the passive cavity, and the heat sink temperature for different relationship between the active and passive cavity lengths. The changes in eigenmode frequencies due to variations of device parameter are calculated before solving the RREs. The mode selection and tuning results obtained from solving the nonlinear RREs could be well explained by linear scattering matrix analysis. The mode tuning process simulated by the proposed model is compared with experimentally measured data, yielding good agreement. Comprehensive study of the influence of the key device parameters on the performance of CC THz QCLs provides potential design rules for single-mode operation with either wide frequency tunability or high stability.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017, Authors. This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/. |
Keywords: | Coupled-cavity; mode tuning; quantum cascade lasers; terahertz |
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) |
Funding Information: | Funder Grant number Royal Society WM110032 EPSRC EP/J017671/1 Royal Society WM150029 |
Depositing User: | Symplectic Publications |
Date Deposited: | 10 Feb 2017 11:12 |
Last Modified: | 13 Oct 2017 17:31 |
Published Version: | https://doi.org/10.1109/JSTQE.2017.2668600 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers |
Identification Number: | 10.1109/JSTQE.2017.2668600 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:112199 |
Commentary/Response Threads
- Qi, X, Kundu, I, Dean, P, Agnew, G, Taimre, T, Valavanis, A, Grier, A, Linfield, EH, Davies, AG, Indjin, D and Rakic, AD Mode selection and tuning mechanisms in coupled-cavity terahertz quantum cascade lasers. (deposited 10 Feb 2017 11:12) [Currently Displayed]