Salih, M, Dean, P, Valavanis, A et al. (5 more authors) (2013) Terahertz quantum cascade lasers with thin resonant-phonon depopulation active regions and surface-plasmon waveguides. Journal of Applied Physics, 113 (11). 113110. ISSN 0021-8979
Abstract
We report three-well, resonant-phonon depopulation terahertz quantum cascade lasers with semi-insulating surface-plasmon waveguides and reduced active region (AR) thicknesses. Devices with thicknesses of 10, 7.5, 6, and 5 μm are compared in terms of threshold current density, maximum operating temperature, output power and AR temperature. Thinner ARs are technologically less demanding for epitaxial growth and result in reduced electrical heating of devices. However, it is found that 7.5-μm-thick devices give the lowest electrical power densities at threshold, as they represent the optimal trade-off between low electrical resistance and low threshold gain.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2013, American Institute of Physics. This is an author produced version of a paper published in the Journal of Applied Physics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | aluminium compounds; current density; gallium arsenide; III-V semiconductors; quantum cascade lasers; surface plasmons; terahertz wave devices; waveguide lasers |
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) > Institute of Communication & Power Networks (Leeds) 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: | 25 Mar 2013 10:19 |
Last Modified: | 08 Feb 2018 06:12 |
Published Version: | http://dx.doi.org/10.1063/1.4795606 |
Status: | Published |
Publisher: | American Institute of Physics |
Identification Number: | 10.1063/1.4795606 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:75278 |