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ZnO-based terahertz quantum cascade lasers

Sirkeli, V.P. and Hartnagel, H.L. (2019):
ZnO-based terahertz quantum cascade lasers.
In: Opto-Electronics Review, 27 (2), pp. 119 - 122. ISSN 1230-3402,
DOI: 10.1016/j.opelre.2019.04.002,
[Article]

Abstract

High-power terahertz sources operating at room-temperature are promising for many applications such as explosive materials detection, non-invasive medical imaging, and high speed telecommunication. Here we report the results of a simulation study, which shows the significantly improved performance of room-temperature terahertz quantum cascade lasers (THz QCLs) based on a ZnMgO/ZnO material system employing a 2-well design scheme with variable barrier heights and a delta-doped injector well. We found that by varying and optimizing constituent layer widths and doping level of the injector well, high power performance of THz QCLs can be achieved at room temperature: optical gain and radiation frequency is varied from 108 cm−1 @ 2.18 THz to 300 cm−1 @ 4.96 THz. These results show that among II–VI compounds the ZnMgO/ZnO material system is optimally suited for high-performance room-temperature THz QCLs.

Item Type: Article
Erschienen: 2019
Creators: Sirkeli, V.P. and Hartnagel, H.L.
Title: ZnO-based terahertz quantum cascade lasers
Language: English
Abstract:

High-power terahertz sources operating at room-temperature are promising for many applications such as explosive materials detection, non-invasive medical imaging, and high speed telecommunication. Here we report the results of a simulation study, which shows the significantly improved performance of room-temperature terahertz quantum cascade lasers (THz QCLs) based on a ZnMgO/ZnO material system employing a 2-well design scheme with variable barrier heights and a delta-doped injector well. We found that by varying and optimizing constituent layer widths and doping level of the injector well, high power performance of THz QCLs can be achieved at room temperature: optical gain and radiation frequency is varied from 108 cm−1 @ 2.18 THz to 300 cm−1 @ 4.96 THz. These results show that among II–VI compounds the ZnMgO/ZnO material system is optimally suited for high-performance room-temperature THz QCLs.

Journal or Publication Title: Opto-Electronics Review
Journal volume: 27
Number: 2
Uncontrolled Keywords: ZnO, MgO, ZnMgO, Quantum well devices, Quantum cascade lasers, Terahertz radiation
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Microwave Electronics
18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics
Date Deposited: 23 Oct 2019 06:01
DOI: 10.1016/j.opelre.2019.04.002
Official URL: http://www.sciencedirect.com/science/article/pii/S1230340218...
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