Bacon, DR, Freeman, JR, Mohandas, RA et al. (4 more authors) (2016) Pump-probe measurements of gain in a terahertz quantum cascade laser. In: 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz) 2016, 25-30 Sep 2016, Copenhagen, Denmark. IEEE ISBN 9781467384858
Abstract
The gain recovery time of a bound-to-continuum terahertz frequency quantum cascade laser, operating at 1.98 THz, has been measured using broadband terahertz-pump-terahertz-probe spectroscopy. The recovery time is found to reduce as a function of current density, reaching a value of 18 ps as the laser is brought close to threshold. We attribute this reduction to improved coupling efficiency between the injector state and the upper lasing level as the active region aligns.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
Keywords: | Quantum cascade lasers; Probes; Gain measurement; Measurement by laser beam; Cavity resonators; Frequency measurement; Time measurement |
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: | 06 Jan 2017 13:15 |
Last Modified: | 17 Jan 2018 03:39 |
Published Version: | https://doi.org/10.1109/IRMMW-THz.2016.7758562 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/IRMMW-THz.2016.7758562 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:110180 |