Stange, D, von den Driesch, N, Zabel, T et al. (12 more authors) (2018) GeSn/SiGeSn Heterostructure and Multi Quantum Well Lasers. ACS Photonics, 5 (11). pp. 4628-4636. ISSN 2330-4022
Abstract
GeSn and SiGeSn are promising materials for the fabrication of a group IV laser source offering a number of design options from bulk to heterostructures and quantum wells. Here, we investigate GeSn/SiGeSn multi quantum wells using the optically pumped laser effect. Three complex heterostructures were grown on top of 200 nm thick strain-relaxed Ge0.9Sn0.1 buffers. The lasing is investigated in terms of threshold and maximal lasing operation temperature by comparing multiple quantum well to double heterostructure samples. Pumping under two different wavelengths of 1064 and 1550 nm yields comparable lasing thresholds. The design with multi quantum wells reduces the lasing threshold to 40 ± 5 kW/cm2 at 20 K, almost 10 times lower than for bulk structures. Moreover, 20 K higher maximal lasing temperatures were found for lower energy pumping of 1550 nm.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 American Chemical Society. This is an author produced version of a paper published in ACS Photonics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | (Si)GeSn; group IV photonics; heterostructures; microdisk cavities; MIR-lasers; multi quantum wells |
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) |
Funding Information: | Funder Grant number Royal Society IE131593 |
Depositing User: | Symplectic Publications |
Date Deposited: | 25 Oct 2018 10:36 |
Last Modified: | 19 Oct 2019 00:38 |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/acsphotonics.8b01116 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:137759 |