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
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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) | ||||
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Depositing User: | Symplectic Publications | ||||
Date Deposited: | 19 Jul 2019 10:59 | ||||
Last Modified: | 15 Sep 2019 00:38 |