n-type Ge/SiGe multi quantum-wells for a THz quantum cascade laser

Ciano, C. et al. (2019) n-type Ge/SiGe multi quantum-wells for a THz quantum cascade laser. ECS Transactions, 93(1), pp. 63-66. (doi: 10.1149/09301.0063ecst)

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Exploiting intersubband transitions in Ge/SiGe quantum cascade devices provides a way to integrate terahertz light emitters into silicon-based technology. With the view to realizing a Ge/SiGe Quantum Cascade Laser, we present the optical and structural properties of n-type strain-symmetrized Ge/SiGe asymmetric coupled quantum wells grown on Si(001) substrates by means of ultrahigh vacuum chemical vapor deposition. We demonstrate the high material quality of strain-symmetrized structures and heterointerfaces as well as control over the inter-well coupling and electron tunneling. Motivated by the promising results obtained on ACQWs, which are the basic building block of a cascade structure, we investigate, both experimentally and theoretically, a Ge/SiGe THz QCL design, optimized through a non-equilibrium Green's function formalism.

Item Type:Articles (Letter)
Additional Information:This work is supported by the European Union Horizon 2020 program under grant No. 766719-FLASH Project.
Glasgow Author(s) Enlighten ID:Paul, Professor Douglas
Authors: Ciano, C., Di Gaspare, L., Montanari, M., Persichetti, L., Baldassarre, L., Ortolani, M., Capellini, G., Skibitzki, O., Zöllner, M., Faist, J., Scalari, G., Stark, D., Paul, D., Rew, K., Moutanabbir, O., Mukherjee, S., Grange, T., Birner, S., Virgilio, M., and De Seta, M.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Research Group:Semiconductor Devices
Journal Name:ECS Transactions
Publisher:Electrochemical Society
ISSN (Online):1938-6737
Copyright Holders:Copyright © 2019 ECS - The Electrochemical Society
First Published:First published in ECS Transactions 93(1):63-66
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
301516Far-infrared Lasers Assembled using SiliconDouglas PaulEuropean Commission (EC)766719ENG - Electronics & Nanoscale Engineering