Song, C, Salih, M orcid.org/0009-0001-6882-4642, Li, LH orcid.org/0000-0003-4998-7259 et al. (5 more authors) (2023) High-power density, single plasmon, terahertz quantum cascade lasers via transverse mode control. Applied Physics Letters, 122 (12). 121108. ISSN 0003-6951
Abstract
Terahertz (THz) quantum cascade lasers (QCLs) have been shown to emit peak powers greater than 1 W from a single facet in a single plasmon geometry. However, this is typically achieved by increasing the laser ridge width, resulting in higher-order transverse modes, limiting the achievable power density. Here, we control and fully suppress these modes through thin metallic side-absorbers, showing laser action solely on the fundamental transverse mode operation without sacrificing high THz peak powers. This leads to enhanced power densities and electric fields of up to 1.8 kW/cm² and 1.17 kV/cm, respectively, opening up the possibility of applying THz QCLs as pump sources for investigations of nonlinear THz physical phenomena.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 Author(s). This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in C. Song, M. Salih, L. H. Li, J. Mangeney, J. Tignon, A. G. Davies, E. H. Linfield, S. Dhillon; High-power density, single plasmon, terahertz quantum cascade lasers via transverse mode control. Appl. Phys. Lett. 20 March 2023; 122 (12): 121108 and may be found at https://doi.org/10.1063/5.0142359. Uploaded in accordance with the publisher's self-archiving policy. |
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: | 19 Apr 2023 13:34 |
Last Modified: | 20 May 2024 12:33 |
Status: | Published |
Publisher: | American Institute of Physics |
Identification Number: | 10.1063/5.0142359 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:198301 |