Dunn, A, Poyser, C, Demic, A et al. (11 more authors) High-speed modulation of a terahertz-frequency quantum-cascade laser using coherent acoustic phonon pulses. In: 2019 Infrared Terahertz Quantum Workshop (ITQW 2019), 15-20 Sep 2019, Ojai, California, USA.
Abstract
We demonstrate a new method for high-speed modulation of the electron transport and photon generation within a terahertz-frequency quantum-cascade laser (THz QCL). An amplified femtosecond laser is used to generate coherent acoustic-phonon pulses, which are injected into the device, resulting in an electronic bandstructure perturbation, with ~1-ns rise-time. The corresponding change in optical gain allows up to ~6% amplitude modulation, with results explained accurately using a perturbation-theory model.
Metadata
Item Type: | Conference or Workshop Item |
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Authors/Creators: |
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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 MRC MR/S015833/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 19 Jul 2019 10:59 |
Last Modified: | 15 Sep 2019 00:38 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:148760 |