Marzban, B, Seidel, L, Liu, T et al. (10 more authors) (2023) Strain Engineered Electrically Pumped SiGeSn Microring Lasers on Si. ACS Photonics, 10 (1). pp. 217-224. ISSN 2330-4022
Abstract
SiGeSn holds great promise for enabling fully group-IV integrated photonics operating at wavelengths extending in the mid-infrared range. Here, we demonstrate an electrically pumped GeSn microring laser based on SiGeSn/GeSn heterostructures. The ring shape allows for enhanced strain relaxation, leading to enhanced optical properties, and better guiding of the carriers into the optically active region. We have engineered a partial undercut of the ring to further promote strain relaxation while maintaining adequate heat sinking. Lasing is measured up to 90 K, with a 75 K T0. Scaling of the threshold current density as the inverse of the outer circumference is linked to optical losses at the etched surface, limiting device performance. Modeling is consistent with experiments across the range of explored inner and outer radii. These results will guide additional device optimization, aiming at improving electrical injection and using stressors to increase the bandgap directness of the active material.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors. Published by American Chemical Society. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) |
Keywords: | group IV lasers; silicon germanium tin (SiGeSn); microdisk lasers; strain engineering |
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: | 22 Dec 2022 13:22 |
Last Modified: | 25 Jun 2023 23:12 |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/acsphotonics.2c01508 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:194631 |