Cooper, JD, Ikonić, Z, Cunningham, JE et al. (4 more authors) (2013) Surface acoustic wave modulation of quantum cascade lasers. In: Proceedings of the International Conference on Advanced Optoelectronics and Lasers, CAOL. 2013 International Conference on Advanced Optoelectronics and Lasers (CAOL), 09-13 Sep 2013, Sudak. IEEE , 22 - 24. ISBN 9781479900183
Abstract
In this work, a description is given of a simulation technique employed to model the interaction between surface acoustic waves and ridge-waveguide quantum cascade lasers (QCLs). Firstly, a finite-difference time-domain (FDTD) scheme for modelling acoustic wave propagation in arbitrary semiconductor structures is outlined, and verified by comparison with experimental measurements of the frequency response of surface acoustic wave transmission between interdigitated transmitters and receivers on a bulk crystal. The model is developed further to represent the ridge-waveguide as a prominence above the surface and the active region of the laser is accounted for by a free-charge region buried within the structure. The modulation of this free charge, or carrier concentration by the propagating surface acoustic wave, is then used as an input to a rate equation model of a QCL to show how the gain will be affected. It is this control of the gain through the amplitude of the surface acoustic wave which will allow for modulation of the mid-infrared or terahertz output of the laser and hence its incorporation in many new applications.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2013, IEEE. This is an author produced version of a paper published in Proceedings of the International Conference on Advanced Optoelectronics and Lasers, CAOL. 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: | 15 Jan 2015 14:39 |
Last Modified: | 19 Dec 2022 13:30 |
Published Version: | http://dx.doi.org/10.1109/CAOL.2013.6657513 |
Status: | Published |
Publisher: | IEEE |
Refereed: | Yes |
Identification Number: | 10.1109/CAOL.2013.6657513 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:82354 |