Daničić, A, Radovanović, J, Milanović, V et al. (2 more authors) (2016) Magnetic field effects on THz quantum cascade laser: A comparative analysis of three and four quantum well based active region design. Physica E: Low-Dimensional Systems and Nanostructures, 81. pp. 275-280. ISSN 1386-9477
Abstract
We consider the influence of additional carrier confinement, achieved by application of strong perpendicular magnetic field, on inter Landau levels electron relaxation rates and the optical gain, of two different GaAs quantum cascade laser structures operating in the terahertz spectral range. Breaking of the in-plane energy dispersion and the formation of discrete energy levels is an efficient mechanism for eventual quenching of optical phonon emission and obtaining very long electronic lifetime in the relevant laser state. We employ our detailed model for calculating the electron relaxation rates (due to interface roughness and electron-longitudinal optical phonon scattering), and solve a full set of rate equations to evaluate the carrier distribution over Landau levels. The numerical simulations are performed for three- and four-well (per period) based structures that operate at 3.9 THz and 1.9 THz, respectively, both implemented in GaAs/Al0.15Ga0.85As. Numerical results are presented for magnetic field values from 1.5 T up to 20 T, while the band nonparabolicity is accounted for.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, Elsevier B.V. All rights reserved. This is an author produced version of a paper published in Physica E: Low-Dimensional Systems and Nanostructures. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Quantum Cascade Laser; Quantum well; Magnetic field |
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: | 29 Apr 2016 15:48 |
Last Modified: | 22 Apr 2017 01:34 |
Published Version: | http://dx.doi.org/10.1016/j.physe.2016.03.019 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.physe.2016.03.019 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:98966 |